OS2O

TRAIL RUNNING

Technical clothing for running and competing in the mountains

TRAIL RUNNING

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  • Size: XS
  • Size: 500 ml

O2 Waterproof Trail Speed Zip Jacket 30k Woman

The O2 Waterproof SPEED ZIP is a competition jacket designed for those women who seek maximum functionality with minimum weight, ideal for athletes looking to save precious seconds during their races. Its innovative design allows it to be worn directly over a backpack or trail vest thanks to a rear zippered gusset that perfectly adapts to the size of the gear, ensuring freedom of movement and uninterrupted protection.

Weighing only 138 grams, this jacket combines extreme lightness with outstanding performance. Made with the O2 30K 2.5-layer membrane, it guarantees 20,000 mm waterproofing and an exceptional breathability of MVTR: 30,000 g/(m²·24h), ideal for high-intensity activities in adverse conditions. Fully taped seams, YKK™ Coil AquaGuard® zippers, and its packable design make the O2 Waterproof SPEED ZIP an essential choice for the most demanding competitors. Its hood with a 3-point adjustment system and flexible visor provides additional protection against wind and rain, while its technical cut is designed to optimize performance in every second of the race.

Perfect for those who value every detail, this jacket offers advanced technology and functional features designed to maximize efficiency in the mountains, even in the most challenging conditions.



FAST&LIGHT - 138g (XS)

Price €189.90

    O2 Waterproof Trail PRO Jacket 30k Woman

    The O2 Waterproof Trail 30K PRO Jacket is the ultimate jacket for thoseseeking to combine lightness, breathability, and protection in trail running. Weighing just 127 grams, this waterproof jacket is 100% windproof and designed to perform at its best in adverse conditions.

    Made with the innovative O2 30K 2.5-layer membrane, it guarantees 20,000 mm waterproofing and exceptional breathability of MVTR: 30,000 g/(m²·24h), ensuring comfort even during high-intensity activities (see test). Fully taped seams, waterproof YKK™ Coil AquaGuard® zippers, and the ability to pack into its own pocket make it an easy and practical choice.

    The hood features a 3-point adjustment system and a flexible visor for additional protection, while its ultralight and technical design is tailored to optimize performance for mountain runners.

    Perfect for rainy or windy days, this jacket combines advanced technology with functional details to ensure an unbeatable trail running experience.

    FAST&LIGHT - 127g (XS)

    Price €169.90

      O2 Waterproof Trail PRO Jacket 30k Woman

      The O2 Waterproof Trail 30K PRO Jacket is the ultimate jacket for thoseseeking to combine lightness, breathability, and protection in trail running. Weighing just 127 grams, this waterproof jacket is 100% windproof and designed to perform at its best in adverse conditions.

      Made with the innovative O2 30K 2.5-layer membrane, it guarantees 20,000 mm waterproofing and exceptional breathability of MVTR: 30,000 g/(m²·24h), ensuring comfort even during high-intensity activities (see test). Fully taped seams, waterproof YKK™ Coil AquaGuard® zippers, and the ability to pack into its own pocket make it an easy and practical choice.

      The hood features a 3-point adjustment system and a flexible visor for additional protection, while its ultralight and technical design is tailored to optimize performance for mountain runners.

      Perfect for rainy or windy days, this jacket combines advanced technology with functional details to ensure an unbeatable trail running experience.

      FAST&LIGHT - 127g (XS)

      Price €169.90

        O2 Waterproof Trail Full Zipper Pants 30k

        Ultralight waterproof, breathable, and windproof pants designed for ski mountaineering and trail running in rainy or snowy conditions. Made with the O2 2.5-layer membrane, waterproof (20,000mm H2O column) and highly breathable (30,000g/m²·24h), they provide maximum protection and comfort for FAST&LIGHT activities. The design features 100% fully taped seams and full-length YKK™ side zippers, allowing quick on-and-off without removing ski mountaineering or trail running boots. They include a dual boot adjustment system, with a zipper and an elastic cord with a tanka, ensuring a perfect and secure fit. Their ergonomic cut supports the natural movement of the knees, providing freedom and comfort with every step. Additionally, they are packable into their own pocket, making them an essential garment for high-intensity competitions and training in adverse weather conditions.

        FAST&LIGHT - 161g (XS)

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        Price €119.90

          O2 Waterproof Trail PRO Pants 30k

          The O2 Waterproof Trail 30K Pants are ultralight, waterproof, breathable, and windproof overpants designed specifically for trail running. Made with the 2.5-layer O2 membrane, they provide outstanding waterproof protection (20,000 mm H2O column) and exceptional breathability (30,000 g/m²·24h). Featuring a comfortable fit that allows natural knee movement without restrictions, they are equipped with an innovative ankle adjustment system, including zippers for easy on/off without removing shoes, and a front toggle that can attach to shoelaces to prevent unwanted movement, even during high-intensity activities. With fully taped seams and YKK™ Coil waterproof zippers, these pants are packable into their own rear pocket, making them ideal for high-intensity training and competitions in the rain.

          FAST&LIGHT - 121g (XS)

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          Price €109.90

            FAST&LIGHT BELT Shorts GRID Woman

            Ultra light pants with woman-specific pattern for trail running, ideals for training and competition. Designed for athletes looking for lightness in addition to a good load capacity in your integrated belt elastic mesh. With seamless inner panties of excellent fit and breathability. Manufactured fabric FASTGRID®, with high-performance threads in a micropore network structure that enhances its ventilation in a minimum weight. Its pleasant touch, along with the absence of seams at the ends offer comfort, lightness and performance. .

            FAST&LIGHT - 87g (XS)

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            Price €59.90

              FAST&LIGHT BELT Shorts GRID Woman

              Ultra light pants with woman-specific pattern for trail running, ideals for training and competition. Designed for athletes looking for lightness in addition to a good load capacity in your integrated belt elastic mesh. With seamless inner panties of excellent fit and breathability. Manufactured fabric FASTGRID®, with high-performance threads in a micropore network structure that enhances its ventilation in a minimum weight. Its pleasant touch, along with the absence of seams at the ends offer comfort, lightness and performance. .

              FAST&LIGHT - 87g (XS)

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              Price €59.90

                FAST&LIGHT Shorts GRID Woman

                Ultra-lightweight trail running shorts, ideal for training and competition. Designed for the most minimalist athletes. Featuring a seamless inner brief with excellent fit and breathability. Made with FASTGRID® fabric, which uses high-performance threads in a microporous mesh structure that enhances ventilation while maintaining minimal weight. Their pleasant touch, combined with the absence of seams on the edges, offers comfort, lightness, and performance.

                FAST&LIGHT - 59g (XS)

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                Price €49.90

                  FAST&LIGHT Shorts GRID Woman

                  Ultra-lightweight trail running shorts, ideal for training and competition. Designed for the most minimalist athletes. Featuring a seamless inner brief with excellent fit and breathability. Made with FASTGRID® fabric, which uses high-performance threads in a microporous mesh structure that enhances ventilation while maintaining minimal weight. Their pleasant touch, combined with the absence of seams on the edges, offers comfort, lightness, and performance.

                  FAST&LIGHT - 59g (XS)

                  YKK 140.jpgfastgrid_os2o.jpg

                  Price €49.90

                    Cotton T-Shirt Woman

                    Women's T-shirt made with SYN Cotton, fabric 100% recycled which provides a good performance in activity plus a soft and fresh touch similar to natural cotton. What. Thanks to its outdoor cut and high elasticity, it allows unrestricted movement, being a multi-purpose garment which can be worn during a medium-intensity activity or daily use.

                    FAST&LIGHT - 110 g (XS) 

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                    Price €34.90

                      Cotton T-Shirt Woman

                      Women's T-shirt made with SYN Cotton, fabric 100% recycled which provides a good performance in activity plus a soft and fresh touch similar to natural cotton. What. Thanks to its outdoor cut and high elasticity, it allows unrestricted movement, being a multi-purpose garment which can be worn during a medium-intensity activity or daily use.

                      FAST&LIGHT - 110 g (XS) 

                      cool2dry.jpg UV protection Made in Spain 140.jpg

                      Price €34.90

                        Thermal Seamless Shirt Woman

                        T-shirt first layer high performance, provides a perfect regulation of body temperature. Made from a mixture of polypropylene and elastane in a seamless construction with thermo-active panels that offer an ideal balance between heat capacity and perspiration. Elastic, soft and adaptable to the body, with unrestricted action adjustment in movements, a garment ideal for indoor use in intense activities at low temperatures.

                        FAST&LIGHT - one hundred and thirty-six grams . (XS)

                        Price €49.90

                          Thermal Seamless Shirt Woman

                          T-shirt first layer high performance, provides a perfect regulation of body temperature. Made from a mixture of polypropylene and elastane in a seamless construction with thermo-active panels that offer an ideal balance between heat capacity and perspiration. Elastic, soft and adaptable to the body, with unrestricted action adjustment in movements, a garment ideal for indoor use in intense activities at low temperatures.

                          FAST&LIGHT - one hundred and thirty-six grams . (XS)

                          Price €49.90

                            Thermal Seamless Shirt Woman

                            T-shirt first layer high performance, provides a perfect regulation of body temperature. Made from a mixture of polypropylene and elastane in a seamless construction with thermo-active panels that offer an ideal balance between heat capacity and perspiration. Elastic, soft and adaptable to the body, with unrestricted action adjustment in movements, a garment ideal for indoor use in intense activities at low temperatures.

                            FAST&LIGHT - one hundred and thirty-six grams . (XS)

                            Price €49.90

                              Thermal Seamless Shirt Woman

                              T-shirt first layer high performance, provides a perfect regulation of body temperature. Made from a mixture of polypropylene and elastane in a seamless construction with thermo-active panels that offer an ideal balance between heat capacity and perspiration. Elastic, soft and adaptable to the body, with unrestricted action adjustment in movements, a garment ideal for indoor use in intense activities at low temperatures.

                              FAST&LIGHT - one hundred and thirty-six grams . (XS)

                              Price €49.90

                                Warmfit Merino 100 Pants Woman

                                Warmfit 100 Merino Wool are high performance base layer pants. Made entirely of merino wool, it offers a high thermal capacity even when wet, combining its natural calorific properties with good breathability to keep you comfortable in the most adverse conditions. It also offers an extra soft touch in contact with the skin. Its ergonomic cut with a specific pattern for women provides a perfect fit, mobility and comfort. An ideal complement as high-performance long johns on the coldest days.

                                FAST&LIGHT - 158g (XS)

                                merino wool

                                Price €69.90

                                  Warmfit Merino 100 Shirt Woman

                                  The Warmfit 100 Merino T-shirt Women is a high-performance thermal garment for mountaineering and alpinism. Made entirely of merino wool, without blends, it offers a high thermal capacity even when wet, combining natural calorific properties with good breathability. Thanks to its soft touch and women-specific ergonomic cut, the Warmfit 100 is a versatile shirt, ideal as a base layer in winter and as an outer shirt on cool days.

                                  FAST&LIGHT - 137g (XS)

                                  merino wool

                                  Price €79.90

                                    Warmfit Merino 100 Shirt Woman

                                    The Warmfit 100 Merino T-shirt Women is a high-performance thermal garment for mountaineering and alpinism. Made entirely of merino wool, without blends, it offers a high thermal capacity even when wet, combining natural calorific properties with good breathability. Thanks to its soft touch and women-specific ergonomic cut, the Warmfit 100 is a versatile shirt, ideal as a base layer in winter and as an outer shirt on cool days.

                                    FAST&LIGHT - 137g (XS)

                                    merino wool

                                    Price €79.90

                                      Minimus WindBreaker Woman

                                      Ultralight breathable and highly packable wind jacket. Made of WindBreaker® fabric, it offers a total barrier against the wind in a minimum weight. Thanks to the wicking treatment of the fabric that transports moisture from the inside to the outside, the Minimus jacket also offers increased airflow and breathability. Mesh panels in the armpits and laser vent holes on the back for a more comfortable use with or without a backpack. Packable in its own pocket, the Minimus jacket is the ideal garment for high pulse activities in fast changing conditions.

                                      FAST&LIGHT - 72  (XS)

                                      Price €89.90

                                        Minimus WindBreaker Woman

                                        Ultralight breathable and highly packable wind jacket. Made of WindBreaker® fabric, it offers a total barrier against the wind in a minimum weight. Thanks to the wicking treatment of the fabric that transports moisture from the inside to the outside, the Minimus jacket also offers increased airflow and breathability. Mesh panels in the armpits and laser vent holes on the back for a more comfortable use with or without a backpack. Packable in its own pocket, the Minimus jacket is the ideal garment for high pulse activities in fast changing conditions.

                                        FAST&LIGHT - 72  (XS)

                                        Price €89.90

                                          Racing Compression Shorts

                                          Compression shorts with integrated belt for trail running. Made with a seamless construction, which offers great freedom of movement, high support for the muscles, no friction, the Racing Shorts are ideal for long distances. With a balanced mix of polyester, polyamide and elastane fibers, they provide high compression while being resistant and highly breathable. Large-capacity integrated belt ideal for use in training and competition, the load is kept without bouncing even at high paces and on technical terrain.  

                                          FAST&LIGHT - 144g (XS)

                                          Price €59.90

                                            Racing Compression Shorts

                                            Compression shorts with integrated belt for trail running. Made with a seamless construction, which offers great freedom of movement, high support for the muscles, no friction, the Racing Shorts are ideal for long distances. With a balanced mix of polyester, polyamide and elastane fibers, they provide high compression while being resistant and highly breathable. Large-capacity integrated belt ideal for use in training and competition, the load is kept without bouncing even at high paces and on technical terrain.  

                                            FAST&LIGHT - 144g (XS)

                                            Price €59.90

                                              Racing Compression Shorts

                                              Compression shorts with integrated belt for trail running. Made with a seamless construction, which offers great freedom of movement, high support for the muscles, no friction, the Racing Shorts are ideal for long distances. With a balanced mix of polyester, polyamide and elastane fibers, they provide high compression while being resistant and highly breathable. Large-capacity integrated belt ideal for use in training and competition, the load is kept without bouncing even at high paces and on technical terrain.  

                                              FAST&LIGHT - 144g (XS)

                                              Price €59.90

                                                EVO StretchShell Jacket Woman

                                                Extremely lightweight and versatile jacket thanks to its high-performance StretchShell Pro with high water resistance (15k), very high breathability (30k) and light thermal protection. A very complete garment for any FAST&LIGHT activity in medium and low temperatures, where protection from weather conditions together with a proper ventilation are guaranteed even during high intensity activities like mountaneering ski.


                                                FAST&LIGHT - 247 grams . (XS)

                                                Premio Mejor Chaqueta de membrana Desnivel 2017

                                                Price €129.90

                                                  EVO StretchShell Jacket Woman

                                                  Extremely lightweight and versatile jacket thanks to its high-performance StretchShell Pro with high water resistance (15k), very high breathability (30k) and light thermal protection. A very complete garment for any FAST&LIGHT activity in medium and low temperatures, where protection from weather conditions together with a proper ventilation are guaranteed even during high intensity activities like mountaneering ski.


                                                  FAST&LIGHT - 247 grams . (XS)

                                                  Premio Mejor Chaqueta de membrana Desnivel 2017

                                                  Price €129.90

                                                    Hoka Ultra Trail Woman

                                                    The Hoka Ultra Trail jacket designed for women is a lightweight and versatile garment. Jacket that fits the body thanks to X-Stretch fabric, allow yourself to make any movementMedium thermal insulation and breathability. Perfect jacket for the practice of trail running in low temperatures.

                                                    FAST&LIGHT - 322g (XS)

                                                    Producto Especial Material Desnivel

                                                    Price €79.90

                                                      Softflask 500ml

                                                      500 ml (17 fl oz) flexible bottle, designed to meet the needs of trail runners and long-distance adventurers. Its wide mouth allows for quick filling, making it easy to add ice or electrolytes to keep your drinks cool and optimize hydration. Made from high-quality, BPA- and PVC-free materials, it is safe for water and other beverages. Thanks to its ultralight design and ability to compress as it empties, it minimizes bounce and the risk of spills, enhancing your experience in demanding conditions. Compatible with most hydration packs, this soft flask is the perfect choice to keep you hydrated on medium and long-distance activities.

                                                      FAST&LIGHT - 42g

                                                      Price €13.90

                                                        StretchLight Trail Belt

                                                        Light high capacity trail running belt ideal for short and medium distance races or as an accesory to a vest in long distance ones. Its seamless highly stretchable fabric provides a perfect fit while carrying a mobile device, gels, bars, gloves, poles (front or back), a 500 ml soft flask and a waterproof jacket in a no-rebound compact way.

                                                        FAST&LIGHT - 61g


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                                                        Price €34.90

                                                          StretchLight Trail Belt

                                                          Light high capacity trail running belt ideal for short and medium distance races or as an accesory to a vest in long distance ones. Its seamless highly stretchable fabric provides a perfect fit while carrying a mobile device, gels, bars, gloves, poles (front or back), a 500 ml soft flask and a waterproof jacket in a no-rebound compact way.

                                                          FAST&LIGHT - 61g


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                                                          Price €34.90

                                                            Saiko Vest

                                                            Ultra-light vest featuring a front windstopper membrane with risptop and back mesh for enhanced breathability. Extremely foldable, it is a perfect accesory for weather changing conditions or windy days.

                                                            FAST&LIGHT - 60 gr (M)

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                                                            Price €39.90

                                                              Saiko Vest

                                                              Ultra-light vest featuring a front windstopper membrane with risptop and back mesh for enhanced breathability. Extremely foldable, it is a perfect accesory for weather changing conditions or windy days.

                                                              FAST&LIGHT - 60 gr (M)

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                                                              Price €39.90

                                                                Seamless Compression Tech Shirt

                                                                Short sleeve compression t-shirt for men and women. Tight cut that adapts to the body like a second skin. It offers the maximum thermal insulation, with an efficient transpitation to keep the body dry all the time. Thermo-regulating effect that gives the garment the condition of cold or heat depending on the conditions and intensity of the activity.

                                                                FAST&LIGHT - 123g (S)
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                                                                Price €32.90

                                                                  Insulation Shorts Woman

                                                                  Insulation overshort for mountain skiing and mountaineering that offer thermal protection for low temperatures. Made of resistant nylon and 100% windproof with Sorona®DuPont® 80g fiber filling. Full side zippers for quick use, even with boots on. YKK® Vislon™ zippers. Exterior water repellent treatment DWR. The ideal companion for FAST&LIGHT activities in low temperatures.

                                                                  FAST&LIGHT - 150g (XS)

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                                                                  Price €79.90

                                                                    Insulation Vest

                                                                    Extremely light insulated vest, designed with a wind-stopper ripstop front membrane, filled with a light (60g/m²) synthetic insulation that provides an extra protection from cold, and a back mesh, that enhances breathability. A perfect complement for medium/high intensity mountain activities in medium/low temperatures.

                                                                    FAST&LIGHT - 150g (M)

                                                                    Price €59.90

                                                                      Insulation Shorts

                                                                      Insulation overshort for mountain skiing and mountaineering that offer thermal protection for low temperatures. Made of resistant nylon and 100% windproof with Sorona®DuPont® 80g fiber filling. Full side zippers for quick use, even with boots on. YKK® Vislon™ zippers. Exterior water repellent treatment DWR. The ideal companion for FAST&LIGHT activities in low temperatures.

                                                                      FAST&LIGHT - 150g (XS)

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                                                                      Price €79.90

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