Mens Under Armour Seamless Long Sleeve T- Shirt in black.- Crew neck.- Nearly sew-free construction to eliminate chafing.- 4-way stretch material moves better in every direction.- Material wicks sweat & dries really fast.- Soft knit fabric with engineered mesh ventilation mapped to the places you need it most.- UA RUSH™ is infrared technology that reflects your body's energy to help you work harder & recover faster.- 52% Nylon 48% Polyester. Machine washable.- Ref: 1361136001