Available sizes: XXLConsult our customer service for your size.The men's Alpinus Active Base Layer Set Thermoactive underwear is the perfect solution for the first layer of outdoor clothing, responsible for wicking moisture and protecting against the cold during low temperature outdoor activities.Thermoactive underwear The Alpinus Thermoactive Active Base Layer Set is designed as an inner layer, responsible for wicking moisture and keeping you warm. The sweatshirt and leggings are made of a stretchy synthetic blend (58% polyamide, 39% polypropylene, 3 elastane) that ensures a perfect fit, freedom of movement and mobility. Thanks to the use of flat seams and stretch fabric, the underwear adheres perfectly to the skin and guarantees excellent comfort during sports and outdoor activities.Men's Thermoactive Underwear Alpinus Active Base Layer Set - breathable underwear for active men The Alpinus Active Base Layer Set underwear features:soft elastic 4-way stretch fabric,flat seams in critical areasperfect fit ensures comfort and mobilityenhanced ventilation zones.warm, quick-drying, hypoallergenic fabrichigh thermal insulation,effectively wicks away external moistureTechnologies used in the AlpinusActive Base Layer Set underwear:Two-layer constructionThe fabric used in the underwear is a two-layered fabric made of polypropylene and polyamide fibres. This provides thermal comfort and facilitates the removal of sweat from the skin.Ventilation zones - Improved ventilation systemVentilated zones are used in areas of increased perspiration, allowing sweat to escape more efficiently during physical exertion.Quick Dry - Quick drying fabricSynthetic quick drying fabrics are used to manufacture the underwear, which absorb virtually no moisture. Thanks to this feature, the underwear dries very quickly after washing.Perfect Fit - Perfectly form-fittingThanks to the elastic structure of the fabric, the underwear adheres perfectly to the body, guaranteeing comfort and mobility.Thermo - High thermal insulationThermo technology is not only responsible for protecting against the cold, but also effectively wicks moisture away from the skin to the surface of the fabric. It also keeps the skin dry and warm during intense physical exertion.Anti Allergy - allergy friendly fabricAlpinus thermoactive underwear is made of anti-allergenic materials that are kind to the skin and do not cause irritation. Thanks to this, the underwear is safe to use even for those with sensitive skin.Seamless - forget about abrasionThe use of flat and elastic seams in sensitive areas prevents friction and uncomfortable pressure. The benefits of flat seams are particularly noticeable when wearing multiple layers of clothing for extended periods of time