Nike Men's SB Long Sleeve Thermal Top 800964 59%Coyyon, 41% Polyester Imported Pull On closure Thermal fabric and rib cuffs for warmth and a secure fit Underarm eyelets for breathability where you need it Rib crew neck with interior taping Snug-fitting, cotton-blend fabric and underarm eyelets for ventilated comfort in colder conditions. Fabric: 59% cotton/41% polyester / Machine wash