Base Layer

A high-performance ski mountaineering race suit designed in collaboration with the Spanish National Skimo Team, with the goal of delivering maximum performance at the Olympic Games. Developed to meet the highest competitive demands, it combines lightweight construction, ergonomic fit, and advanced functionality.

Made with AeroSkin fabric, featuring four-way stretch, it adapts perfectly to the body, providing maximum comfort, freedom of movement, and optimal thermal regulation/breathability in extreme conditions. Weighing just 319 grams, it is possibly the lightest suit on the market.

It includes a double elastic pocket for quick access to climbing skins and an inner zippered pocket to securely store essentials without compromising aerodynamics. Additionally, it features a quick-access opening in the ventral area for extremely fast storage of skins. The ankle area is reinforced with ultra-light and durable Dyneema® for increased durability, while an upper band and an interchangeable elastic strap ensure a precise fit over the boot, preventing snow from sticking and creating a "clog" effect.

Moreover, a strategically designed rear opening allows compatibility with any ski boot fastening system. A 100% FAST&LIGHT garment, meticulously engineered for top-level competition, optimizing every detail for maximum speed and efficiency on the snow.

FAST&LIGHT - 319g (XS) 

The W-Series pants/suit for alpinism in extreme high-altitude activities. Ready for the cold? Our W-Series Alpine Suit pants feature an insulated bottom/legs and a top made from Polar Stretch Grid® fabric in the form of overalls, providing you with extra warmth. The top has two pockets, which, when combined with other pieces from the W-Series collection, allow you to keep everything accessible in the chest area, protected from the cold even while wearing a harness. The Kevlar fabric on the knees, lower legs, and back ensures durability against abrasions from rock/ice. 

The outer fabric offers excellent wind and rain resistance (PFC-Free), and when combined with the Sorona® bio-synthetic fill panels (160 gr/m2), it guarantees thermal protection and optimal breathability. Pair it with other items from the W-Series collection to discover the lightest and most functional way to tackle the mountains. Ideal to wear over the W-Series Merino Base Layer t-shirt. Combine it with the W-Series Waterproof Shell Pants for the perfect combination of cold protection and waterproofing. Designed for very high-altitude activities in extremely cold temperatures. 

FAST&LIGHT - 642 g.  (S)

A first layer with very high thermal protection that combines the best of two fabrics: the thermoregulation and natural antibacterial properties of merino wool with the adaptability and ventilation of Polar Stretch Grid® fabric. Positioned in strategic areas, they create a warm, comfortable, and highly versatile garment. The feature you'll appreciate the most is its built-in neck gaiter, which prevents cold from entering through the neck and, thanks to its length, can also be worn as a hat, keeping you warm and protected at all times. Ideal for FAST&LIGHT activities in severe cold conditions.

FAST&LIGHT - 286 g.  (S)

The Warmfit 100 Merino T-shirt 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 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 - 183g (S)

The Warmfit 100 Merino T-shirt 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 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 - 183g (S)

The Warmfit 100 Merino T-shirt 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 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 - 183g (S)

The Warmfit 100 Merino T-shirt 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 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 - 183g (S)

T-shirt first layer it provides perfect regulation of body temperature. Made from a mixture of polypropylene and elastane seamless construction with thermo-active panels optimized to enhance ventilation in areas of increased sweating. Elastic, soft and adaptable to the body, with unrestricted action adjustment in movements, a ideal clothing for indoor aerobic activities at low temperatures or outdoor at medium temperatures.

FAST&LIGHT - one hundred and forty-four grams . (S)

T-shirt first layer it provides perfect regulation of body temperature. Made from a mixture of polypropylene and elastane seamless construction with thermo-active panels optimized to enhance ventilation in areas of increased sweating. Elastic, soft and adaptable to the body, with unrestricted action adjustment in movements, a ideal clothing for indoor aerobic activities at low temperatures or outdoor at medium temperatures.

FAST&LIGHT - one hundred and forty-four grams . (S)

The Skin Feel® Sun Hoodie is a lightweight and breathable sweatshirt designed for summer mountain activities. Made from Skin Feel® fabric, it delivers a soft touch, excellent lightness, and integrated UPF 50+ sun protection.

Suitable for a wide range of outdoor use—mountain routes, trail running sessions, or climbing on sun-exposed walls—as well as moments of rest or post-activity recovery. Its technical design offers comfort and performance in warm conditions.

A laser-cut perforated back panel enhances ventilation during intense efforts or hot days, helping maintain a constant feeling of freshness.

A versatile, functional, and ultra-comfortable garment, ideal for those who seek sun protection, lightness, and full freedom of movement in summer conditions.

FAST&LIGHT – 134g (S)

The Skin Feel® Sun Hoodie is a lightweight and breathable sweatshirt designed for summer mountain activities. Made from Skin Feel® fabric, it delivers a soft touch, excellent lightness, and integrated UPF 50+ sun protection.

Suitable for a wide range of outdoor use—mountain routes, trail running sessions, or climbing on sun-exposed walls—as well as moments of rest or post-activity recovery. Its technical design offers comfort and performance in warm conditions.

A laser-cut perforated back panel enhances ventilation during intense efforts or hot days, helping maintain a constant feeling of freshness.

A versatile, functional, and ultra-comfortable garment, ideal for those who seek sun protection, lightness, and full freedom of movement in summer conditions.

FAST&LIGHT – 134g (S)

The OS2O Trail Long Man is designed to offer the perfect balance between lightweight protection, active breathability, and thermal comfort during mountain training sessions or races in variable weather conditions, especially in spring and autumn

With a technical and ergonomic design, it is primarily made with stretchy Cool2Dry® fabric, providing an ultra-soft touch, quick drying, and excellent freedom of movement—ideal for technical routes or days with changing weather. The back and underarm areas feature technical mesh panels that allow active ventilation in key zones and enhance abrasion resistance when using backpacks or hydration vests

The long sleeves offer extra protection against vegetation, branches, or gear contact, without adding weight or compromising breathability

A technical, lightweight, and versatile garment for those seeking uncompromising performance with added coverage in the mountains

FAST&LIGHT - 116 grams (S)

The OS2O Trail Long Man is designed to offer the perfect balance between lightweight protection, active breathability, and thermal comfort during mountain training sessions or races in variable weather conditions, especially in spring and autumn

With a technical and ergonomic design, it is primarily made with stretchy Cool2Dry® fabric, providing an ultra-soft touch, quick drying, and excellent freedom of movement—ideal for technical routes or days with changing weather. The back and underarm areas feature technical mesh panels that allow active ventilation in key zones and enhance abrasion resistance when using backpacks or hydration vests

The long sleeves offer extra protection against vegetation, branches, or gear contact, without adding weight or compromising breathability

A technical, lightweight, and versatile garment for those seeking uncompromising performance with added coverage in the mountains

FAST&LIGHT - 116 grams (S)

The OS2O Trail Long Man is designed to offer the perfect balance between lightweight protection, active breathability, and thermal comfort during mountain training sessions or races in variable weather conditions, especially in spring and autumn.

With a technical and ergonomic design, it is primarily made with stretchy Cool2Dry® fabric, providing an ultra-soft touch, quick drying, and excellent freedom of movement—ideal for technical routes or days with changing weather. The back and underarm areas feature technical mesh panels that allow active ventilation in key zones and keeping your skin cool and dry even during high-intensity activties.

The long sleeves offer extra protection against vegetation, branches, or gear contact, without adding weight or compromising breathability.

A technical, lightweight, and versatile garment for those seeking uncompromising performance with added coverage in the mountains.

FAST&LIGHT - 116 grams (S)

The OS2O Trail Long Man is designed to offer the perfect balance between lightweight protection, active breathability, and thermal comfort during mountain training sessions or races in variable weather conditions, especially in spring and autumn.

With a technical and ergonomic design, it is primarily made with stretchy Cool2Dry® fabric, providing an ultra-soft touch, quick drying, and excellent freedom of movement—ideal for technical routes or days with changing weather. The back and underarm areas feature technical mesh panels that allow active ventilation in key zones and keeping your skin cool and dry even during high-intensity activties.

The long sleeves offer extra protection against vegetation, branches, or gear contact, without adding weight or compromising breathability.

A technical, lightweight, and versatile garment for those seeking uncompromising performance with added coverage in the mountains.

FAST&LIGHT - 116 grams (S)

The new version of the OS2O Trail T-Shirt redefines comfort and functionality with key improvements in fabric and design, offering an ergonomic fit for a seamless experience during high-intensity training or racing The front and sleeves are made with stretchy Cool2Dry® fabric, providing full freedom of movement, an ultra-soft touch, and fast drying—ideal for technical outings and warm climates. The back features a mesh panel that enhances active ventilation, keeps the body cool and dry even during high-intensity activties.

Designed for those who seek a lightweight, breathable technical t-shirt with uncompromising mountain performance.

FAST&LIGHT - 91 gramos (S)

The new version of the OS2O Trail T-Shirt redefines comfort and functionality with key improvements in fabric and design, offering an ergonomic fit for a seamless experience during high-intensity training or racing The front and sleeves are made with stretchy Cool2Dry® fabric, providing full freedom of movement, an ultra-soft touch, and fast drying—ideal for technical outings and warm climates. The back features a mesh panel that enhances active ventilation, keeps the body cool and dry even during high-intensity activties.

Designed for those who seek a lightweight, breathable technical t-shirt with uncompromising mountain performance.

FAST&LIGHT - 91 gramos (S)

The new version of the OS2O Trail T-Shirt redefines comfort and functionality with key improvements in fabric and design, offering an ergonomic fit for a seamless experience during high-intensity training or racing The front and sleeves are made with stretchy Cool2Dry® fabric, providing full freedom of movement, an ultra-soft touch, and fast drying—ideal for technical outings and warm climates. The back features a mesh panel that enhances active ventilation, keeps the body cool and dry.

Designed for those who seek a lightweight, breathable technical t-shirt with uncompromising mountain performance.

FAST&LIGHT - 91 gramos (S)

The new version of the OS2O Trail T-Shirt redefines comfort and functionality with key improvements in fabric and design, offering an ergonomic fit for a seamless experience during high-intensity training or racing The front and sleeves are made with stretchy Cool2Dry® fabric, providing full freedom of movement, an ultra-soft touch, and fast drying—ideal for technical outings and warm climates. The back features a mesh panel that enhances active ventilation, keeps the body cool and dry.

Designed for those who seek a lightweight, breathable technical t-shirt with uncompromising mountain performance.

FAST&LIGHT - 91 gramos (S)

Camiseta técnica y ultraligera de manga corta diseñada para mantenerte fresco y seco en competiciones y entrenamientos exigentes. Confeccionada en tejido de Cool2Dry® perforado que aporta una ventilación extra y mejora la disipación del calor en los momentos de alta intensidad; además, ofrece un tacto suave en contacto con la piel.  

FAST&LIGHT - 64g

Camiseta técnica y ultraligera de manga corta diseñada para mantenerte fresco y seco en competiciones y entrenamientos exigentes. Confeccionada en tejido de Cool2Dry® perforado que aporta una ventilación extra y mejora la disipación del calor en los momentos de alta intensidad; además, ofrece un tacto suave en contacto con la piel.  

FAST&LIGHT - 64g

Ultralight and breathable technical shirt without sleeves designed as underwear for very high intensity activities and competitions. What. Manufacture from fabric Effepi Avatar it combines microfiber from polyester and elastane, weighing just 75 grams. /m2 , the Race Day T-shirt fits smoothly like a second skin to let out moisture generated by the body and keep it cool and dry. Its microperforations enhance ventilation while providing greater elasticity in all 4 directions for better fit. A first layer that ensures light thermal protection, quick drying and comfort for days when moving fast is a priority.  

FAST&LIGHT - 45 grams

The Skin Feel® T-Shirt is a short-sleeve shirt designed to accompany you in all types of outdoor activities—from mountain routes and trail training to recovery and post-activity moments.

Made from Skin Feel® fabric, it stands out for its lightness, softness, and cool feel against the skin. The micro-perforated back panel enhances breathability in hot or high-exertion conditions, while integrated UPF sun protection keeps you safe under the sun.

A versatile, minimalist, and ultra-comfortable garment, ideal for those seeking performance and comfort across a wide range of activities.

FAST&LIGHT - 78 g (S)

The Skin Feel® T-Shirt is a short-sleeve shirt designed to accompany you in all types of outdoor activities—from mountain routes and trail training to recovery and post-activity moments.

Made from Skin Feel® fabric, it stands out for its lightness, softness, and cool feel against the skin. The micro-perforated back panel enhances breathability in hot or high-exertion conditions, while integrated UPF sun protection keeps you safe under the sun.

A versatile, minimalist, and ultra-comfortable garment, ideal for those seeking performance and comfort across a wide range of activities.

FAST&LIGHT - 78 g (S)

Technical and ultra-light shirt without sleeves designed for keep you cool and dry in competitions and high demand trainings. Made in fabric of Cool2Dry® pierced that thanks to its air channels provides extra ventilation and improves heat dissipation in moments of great effort; in addition, it offers a soft touch in contact with the skin. Ideal for intense activities in high temperatures.

FAST&LIGHT - 60g

Technical and ultra-light shirt without sleeves designed for keep you cool and dry in competitions and high demand trainings. Made in fabric of Cool2Dry® pierced that thanks to its air channels provides extra ventilation and improves heat dissipation in moments of great effort; in addition, it offers a soft touch in contact with the skin. Ideal for intense activities in high temperatures.

FAST&LIGHT - 60g

The AIRLITE T-Shirt is an ultra-lightweight, seamless shirt designed for maximum comfort and performance. Made from 100% Dryarn®, a cutting-edge polypropylene fiber, this shirt excels in breathability and thermal insulation, keeping your body dry even during intense activities. Weighing just 75 grams, it’s perfect as a base layer in cold conditions or as an outer layer in mild or warm climates. This shirt is ideal for trail running, mountaineering, and skimo, where weight and performance are crucial.

FAST&LIGHT - 75g (S)

The AIRLITE T-Shirt is an ultra-lightweight, seamless shirt designed for maximum comfort and performance. Made from 100% Dryarn®, a cutting-edge polypropylene fiber, this shirt excels in breathability and thermal insulation, keeping your body dry even during intense activities. Weighing just 75 grams, it’s perfect as a base layer in cold conditions or as an outer layer in mild or warm climates. This shirt is ideal for trail running, mountaineering, and skimo, where weight and performance are crucial.

FAST&LIGHT - 75g (S)

T-shirt made with SYN Cotton, fabric 100% recycled whichprovides 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 - 128 g (S) 

T-shirt made with SYN Cotton, fabric 100% recycled whichprovides 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 - 128 g (S)