UYN MAN EVOLUTYON BIOTECH UW SHIRT LONG_SL Black 2026 UnderwearUYN MAN EVOLUTYON BIOTECH UW SHIRT LONG_SL Black 2026 Underwear - men's thermal sweatshirt is the absolute pinnacle of natural biofabric technology. This model opens a new era in the world of premium underwear, combining patented UYN fibers, ecological raw materials, and an advanced construction that supports the body in all conditions.Kapok fiber, the lightest in the world, creates extremely efficient natural insulation, maintaining an ideal microclimate at lower temperatures. Elastic Flexicorn yarn, obtained from corn seeds, guarantees a perfect fit and full freedom of movement.The entire structure is supported by ventilation, immediate moisture wicking, and heat recovery systems, making this sweatshirt one of the most structurally advanced base layers in the world.Evolutyon Biotech is a model for demanding athletes and professionals who expect maximum functionality, completely natural materials, and comfort even during extreme use.Features UYN MAN EVOLUTYON BIOTECH UW SHIRT LONG_SL Black 2026BIOLIGHT – natural lightness and freshness Biomaterial with an exceptionally low weight and breathability, ensuring a pleasant feeling of dryness and natural thermoregulation typical of plant fibers.FLEXICORN – elasticity by nature A fiber derived from corn, extremely resilient and durable. It guarantees a perfect fit for the male figure, without restricting movement, even with extensive arm movements.KAPOK – the lightest natural insulation in the world Hollow kapok fibers create a natural thermal barrier. They provide excellent protection at lower temperatures while maintaining a minimal weight of the entire structure.ECOLYPT – the softness of eucalyptus Yarn derived from eucalyptus cellulase. Naturally antibacterial, breathable, and gentle on the skin. High comfort even during prolonged exertion.RESIFIT – structural resistance Reinforced elbow and joint zones increase the durability of the sweatshirt and stabilize movement, supporting the body during intense activity.HEATMEMORY – warmth that returns Zones that retain heat after exercise. They protect muscles from cooling, maintaining a stable temperature during rest and lower activity levels.NATEX – yarn from natural sources Ecological, biodegradable fiber, up to 25% lighter than traditional nylon. Dries faster, is more flexible, and much more comfortable on the skin.HYPERMOTION – seamless, full-motion performance The entire arm and shoulder area is made of a single piece of material, without vertical seams. Increases mobility, supports posture, and eliminates friction during dynamic movements.DRYLIGHT – immediate moisture wicking Ultralight weave zones under the armpits and in areas of highest sweating. Keeps skin dry even during prolonged exertion.COOLVENT – active 360° ventilation The structure of the air channel system maintains constant airflow. Effectively cools during active phases and quickly transports moisture to the outside.Frequently Asked QuestionsFor whom? For men who expect maximum quality, natural materials, and the highest level of thermoregulation in cold and moderate temperatures. Perfect for athletes, skiers, runners, and outdoor enthusiasts.Why this model? This is the most advanced, technically natural UYN sweatshirt—a unique combination of kapok, biomaterials, and patented technologies provides comfort unmatched by premium synthetic models.What does it offer for everyday riding/training? Exceptional insulation without excess weight, excellent breathability, rapid sweat wicking, and absolute freedom of movement. Your skin stays dry, your body maintains a stable temperature, and your muscles work more efficiently.