Sweat wicking fabric. Anti-microbial material with ultra soft seams. 82% Nylon, 18% Elastane Dry Clean Only Fastening: Pull On Collar Style: One Piece Collar Classic Athletic Fit Long Sleeve Wash at 30 degrees, non-biological detergent only. Do not bleach. Do not tumble dry. Do not iron over logo areas. Do not dry clean. Collar Style: One Piece Collar 377 degree stretch for comfort and greater mobility