Anvil 4640 50/50 Stain Release Long-Sleeve Sport Shirt Poly-cotton 5.6 oz., 50/50 cotton/poly with Spill Guard stain-release technology. Soft fashion knit contoured collar and welt sleeves.. Three-button clean-finished placket with 1/4" reinforced stitching. Double-needle stitched bottom hem. Sideseam construction with 2 1/2" side vents.