Columbia Men's 2-Pack Cotton Stretch Muscle Tee 95% Cotton, 5% Spandex Imported Machine Wash Cotton stretch muscle tee fabric is soft, breathable and moves with your body. Athletic fit. 2 pack Flat anti-chafing stitches. Tag free Antimicrobial treatment on fabric Omni-wick advanced evaporation pulls moisture away from the body and enables perspiration to evaporate quickly, keeping you dry and comfortable Lightweight stretch for daily use, works as undershirt or lifestyle athletic tee