SOL'S PIONEER MEN, Men's Round-Neck Fitted Jersey T-Shirt, 100% Organically Grown Cotton, Natural Finish For A Softer And Smoother Feel Jersey 175, 100% Cotton Ribbed Collar, Round Neck, Neck Tape, Fitted Cut, Tubular, (1) Ash : 98 % Organic Cotton / 2 % Viscose, (2) Grey Melange : 85 % Organic Cotton / 15 % Viscose. About Sizes Matching, Please Refer To The Size Chart In The Product Documentation Section.