Carhartts midweight crewneck sweatshirt comes in a 10.5-ounce, midweight blend of 50% and 50% polyester fleece. To seal out the cold and lock in the warmth, it features stretchable spandex rib-knit cuffs and waistband. Heather Gray fiber content is 70% cotton/ 30% polyester. Charcoal Heather fiber content is 55% cotton / 45% polyester.