10.5 oz./yd² (US), 17.5 oz./L yd (CA), 75/25 cotton/polyester, 18 singles Sport Grey is 70/30 cotton/polyester The Hammer Maxweight fleece is a combination of style and functionality 100% cotton face, ideal for a variety of cotton friendly decorating techniques. Classic fit 1x1 rib at cuffs and waistband Tear away label Responsible Supplier:  this product was made in a facility that is OEKO-TEX and FLA certified. Responsible Materials:  contains US grown BCI cotton