8% Spandex Pull On closure SOFT & COMFORTABLE - No middle seams design prevent chafing and irritation to eliminates abrasion and enhances fit by reducing bulky seams. Also, durable sport is nice to resistant to piling. They fit snug like a second skin for perfect heat retention minimizing heat loss for an ideal base layer or worn on their own. HEAT PRESERVATION - Made of 92% polyester and 8% spandex, the thermal underwear designed using double-seamless technology with top quality thermal properties. It can keep you warm while running, cycling, hiking, jogging or walk the dog in the winter morning LIGHT & BRETHABILITY - Perfect for cold weather, comfy stretch softwear in normal thickness, breathable, lightweight but warm, works excellently during your winter activities like snowboarding for added warmth 4-WAY STRETCH- Mens thermal compression baselayer is designed with four way stretch compression for your freedom of outdoor activities, which makes it easy for you to fit the long thermal set well and move without feeling uncomfortable. FOR ANY OCCASION - This thermal underwear men for cold weather is idea gear for all kinds of activities, such as training, rash guard, running, squat, weight training, cycling, yoga, soccer, skiing, snowboarding, indoor gym exercise, fitness body training8% Spandex Pull On closure SOFT & COMFORTABLE - No middle seams design prevent chafing and irritation to eliminates abrasion and enhances fit by reducing bulky seams. Also, durable sport is nice to resistant to piling. They fit snug like a second skin for perfect heat retention minimizing heat loss for an ideal base layer or worn on their own. HEAT PRESERVATION - Made of 92% polyester and 8% spandex, the thermal underwear designed using double-seamless technology with top quality thermal properties. It can keep you warm while running, cycling, hiking, jogging or walk the dog in the winter morning LIGHT & BRETHABILITY - Perfect for cold weather, comfy stretch softwear in normal thickness, breathable, lightweight but warm, works excellently during your winter activities like snowboarding for added warmth 4-WAY STRETCH- Mens thermal compression baselayer is designed with four way stretch compression for your freedom of outdoor activities, which makes it easy for you to fit the long thermal set well and move without feeling uncomfortable. FOR ANY OCCASION - This thermal underwear men for cold weather is idea gear for all kinds of activities, such as training, rash guard, running, squat, weight training, cycling, yoga, soccer, skiing, snowboarding, indoor gym exercise, fitness body training