MLB Boston Red Sox SS V-Neck Polo Shirt 50%Polyester/37%Cotton/13%Rayon Imported 5th & Ocean Heatheredtri-blend slub short sleeve V-neck; 50% polyester, 37% cotton, 13% rayon Soft and Stretchyheatheredjersey drapes well and has comfortable fit Fitted silhouette, see size chart below and order a size up if in between sizes Small fits 32"-33 1/2" bust, 24"-26" waist; Medium fits 34"-35" bust, 26.5"-27.5" waist; Large fits 36"-38" bust, 28"-30" waist; X Large fits 38.5"-39.5" bust, 30.5"-32" waist