Two Piece Slate Grey Mens Compression Sleeveless Tank Top Undershirts 94% Dryactive plus microfiber and 6% Spandex Imported no bleach tumble dry Two (slate grey) Breathable and moisture-wicking undershirt thanks to Dryactive Plus high performance polyester Eight panels construction with spandex for a perfect fit and optimum freedom of movement Mesh inserts around arm-pits for comfort Figure-hugging cut with elasticized flat-lock seams to prevent chafing Size run little big compare to other compression shirt