the Uyn Energyon technical underwear for women is a very breathable model, designed for Nordic ski training at a steady pace as well as for ski touring in milder weather. On the contrary, it will not be suitable for more quiet outings on very cold days because the Flowtunnels technology ensures a permanent air flow. This system consists of multiple perforations in the areas most likely to overheat, such as the back, armpits and chest. Moisture is quickly evacuated and body temperature can be effectively maintained. The long sleeves add lightweight thermal insulation and the high elasticity of the fabric allows for free movement. Finally, this top is designed without vertical seams to avoid chafing and promote better muscle support. Features: Composition: 99% polyamide, 1% polypropyleneNatex nylon fiber: 100% organic fiber, quick drying, thermo-regulating and odor limitingFlowtunnels technology: perforations in strategic areas (underarms, back, chest) to optimize breathabilityOne-piece construction with no vertical seams at arms and shouldersSlim fit Technical underwear Uyn ---W Energyon Shirt LS Black