Base Layer

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)

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)

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)

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)

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)

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)

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)

The Skin Feel® Sun Hoodie Women is a lightweight and breathable layer specifically designed for the female body, ideal 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 hikes, trail running sessions, or climbing on sun-exposed walls—as well as moments of rest or post-activity recovery. Its technical design offers comfort, ventilation, and functionality in warm conditions.

A laser-cut perforated back panel enhances breathability during intense efforts or hot days, helping maintain a consistent cooling sensation.

A versatile, functional, and ultra-comfortable garment, ideal for women seeking prot

FAST&LIGHT – 95g (XS)

The new OS2O Women's Long-Sleeve Trail Running Shirt redefines lightweight protection and technical comfort with a design specifically tailored to the female anatomy. Designed for high-intensity mountain training and racing, especially during transitional seasons (spring and autumn), it offers an ergonomic fit, strategic breathability, and full freedom of movement for peak performance on the trail.

It is primarily made with Cool2Dry®, a stretchy technical fabric that delivers an ultra-soft feel against the skin, excellent elasticity, and quick-drying properties—ideal for variable or mild climates. The side panels, underarms, and inner sleeves feature ultra-light technical mesh, strategically placed to enhance ventilation in key sweat zones and maintain freshness even during extended efforts.

The long sleeves provide an extra layer of protection against brush, cool wind, or sun exposure—without compromising lightness or comfort.

A versatile, technical garment for mountain runners who demand uncompromising performance, effective thermoregulation, and added protection during mid-season conditions.

FAST&LIGHT - 92 gramos (XS)

The new OS2O Women's Long-Sleeve Trail Running Shirt redefines lightweight protection and technical comfort with a design specifically tailored to the female anatomy. Designed for high-intensity mountain training and racing, especially during transitional seasons (spring and autumn), it offers an ergonomic fit, strategic breathability, and full freedom of movement for peak performance on the trail.

It is primarily made with Cool2Dry®, a stretchy technical fabric that delivers an ultra-soft feel against the skin, excellent elasticity, and quick-drying properties—ideal for variable or mild climates. The side panels, underarms, and inner sleeves feature ultra-light technical mesh, strategically placed to enhance ventilation in key sweat zones and maintain freshness even during extended efforts.

The long sleeves provide an extra layer of protection against brush, cool wind, or sun exposure—without compromising lightness or comfort.

A versatile, technical garment for mountain runners who demand uncompromising performance, effective thermoregulation, and added protection during mid-season conditions.

FAST&LIGHT - 92 gramos (XS)

The new OS2O Women's Long-Sleeve Trail Running Shirt redefines lightweight protection and technical comfort with a design specifically tailored to the female anatomy. Designed for high-intensity mountain training and racing, especially during transitional seasons (spring and autumn), it offers an ergonomic fit, strategic breathability, and full freedom of movement for peak performance on the trail.

It is primarily made with Cool2Dry®, a stretchy technical fabric that delivers an ultra-soft feel against the skin, excellent elasticity, and quick-drying properties—ideal for variable or mild climates. The side panels, underarms, and inner sleeves feature ultra-light technical mesh, strategically placed to enhance ventilation in key sweat zones and maintain freshness even during extended efforts.

The long sleeves provide an extra layer of protection against brush, cool wind, or sun exposure—without compromising lightness or comfort.

A versatile, technical garment for mountain runners who demand uncompromising performance, effective thermoregulation, and added protection during mid-season conditions.

FAST&LIGHT - 92 gramos (XS)

The new OS2O Women's Long-Sleeve Trail Running Shirt redefines lightweight protection and technical comfort with a design specifically tailored to the female anatomy. Designed for high-intensity mountain training and racing, especially during transitional seasons (spring and autumn), it offers an ergonomic fit, strategic breathability, and full freedom of movement for peak performance on the trail.

It is primarily made with Cool2Dry®, a stretchy technical fabric that delivers an ultra-soft feel against the skin, excellent elasticity, and quick-drying properties—ideal for variable or mild climates. The side panels, underarms, and inner sleeves feature ultra-light technical mesh, strategically placed to enhance ventilation in key sweat zones and maintain freshness even during extended efforts.

The long sleeves provide an extra layer of protection against brush, cool wind, or sun exposure—without compromising lightness or comfort.

A versatile, technical garment for mountain runners who demand uncompromising performance, effective thermoregulation, and added protection during mid-season conditions.

FAST&LIGHT - 92 gramos (XS)

The new OS2O Trail Running T-shirt for women redefines lightweight performance and technical comfort with a design specifically tailored to the female anatomy. Designed for high-intensity training and racing, it combines an ergonomic fit, strategic breathability, and an ultra-soft feel to elevate mountain performance.

It is primarily made from Cool2Dry®, a stretchy technical fabric that provides excellent freedom of movement, quick drying, and exceptional softness against the skin. The side panels and inner sleeves feature ultra-light mesh fabric, strategically placed to enhance ventilation in high-sweat areas.

With a slim fit and high-stretch materials, it fits like a second skin without restricting movement. A lightweight, breathable technical garment for mountain runners who demand uncompromising performance, even on the most demanding trails.

FAST&LIGHT - 67 grams (XS)

The new OS2O Trail Running T-shirt for women redefines lightweight performance and technical comfort with a design specifically tailored to the female anatomy. Designed for high-intensity training and racing, it combines an ergonomic fit, strategic breathability, and an ultra-soft feel to elevate mountain performance.

It is primarily made from Cool2Dry®, a stretchy technical fabric that provides excellent freedom of movement, quick drying, and exceptional softness against the skin. The side panels and inner sleeves feature ultra-light mesh fabric, strategically placed to enhance ventilation in high-sweat areas.

With a slim fit and high-stretch materials, it fits like a second skin without restricting movement. A lightweight, breathable technical garment for mountain runners who demand uncompromising performance, even on the most demanding trails.

FAST&LIGHT - 67 grams (XS)

The new OS2O Trail Running T-shirt for women redefines lightweight performance and technical comfort with a design specifically tailored to the female anatomy. Designed for high-intensity training and racing, it combines an ergonomic fit, strategic breathability, and an ultra-soft feel to elevate mountain performance.

It is primarily made from Cool2Dry®, a stretchy technical fabric that provides excellent freedom of movement, quick drying, and exceptional softness against the skin. The side panels and inner sleeves feature ultra-light mesh fabric, strategically placed to enhance ventilation in high-sweat areas.

With a slim fit and high-stretch materials, it fits like a second skin without restricting movement. A lightweight, breathable technical garment for mountain runners who demand uncompromising performance, even on the most demanding trails.

FAST&LIGHT - 67 grams (XS)

The Skin Feel® T-Shirt Women is a short-sleeve shirt specifically designed for the female body, offering the perfect balance of comfort, performance, and style. Ideal for all kinds 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 covered even during the most exposed outings.

A versatile, minimalist, and ultra-comfortable garment, made for women who seek performance and comfort across a wide range of activities.

FAST&LIGHT - 58g (XS) 

The Skin Feel® T-Shirt Women is a short-sleeve shirt specifically designed for the female body, offering the perfect balance of comfort, performance, and style. Ideal for all kinds 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 covered even during the most exposed outings.

A versatile, minimalist, and ultra-comfortable garment, made for women who seek performance and comfort across a wide range of activities.

FAST&LIGHT - 58g (XS)