MaterialThese High-Quality Men'S Thermal Vests Are Very Soft, But Definitely Not Bulky. Comfortable And Warm Men'S Thermal Base Layer. This Insulating Fabric Maintains Its Single Layer To Lock In Body Heat While Also Absorbing Moisture Well. WarmThese Men'S Thermal Tops Feature Thermal Insulation Technology To Ensure You Stay Warm, The Base Layer Has An Excellent Perspiration Rate That Wicks Sweat Away From The Skin And Provides Extra Warmth, Men'S Thermal Tops Are Perfect For Your Ski Base Layer Or Autumn And Pajamas Winter Base LayerOur Warm Base Layer Fits Your Natural Body Shape, High Elasticity And Strong Contraction Provide Super Comfort And Easy Wearing. OccasionThis Men'S Thermal Top With Long Sleeves Is Suitable For Cold Weather, Perfect As Ski Thermal Underwear, Daily Thermal Underwear, Pajamas And Base Layer. Men'S Thermal Clothing Is The Perfect Choice For All Indoor Or All Outdoor Activities, This Thermal Underwear Is Perfect For Hockey, Skiing, Training, Running, Cycling, Outdoor Work Or Everyday Wear And More, It Keeps Its Shape Even After Multiple Washes.