Our thermal-lined crewneck sweatshirt combines warmth and comfort in a classic cut. On the outside, there’s a durable, 12-ounce 50% cotton/50% polyester fleece blend, while the inside features a 100% polyester thermal lining. Its two side-seam pockets are lined for warmth. spandex-reinforced rib-knit cuffs and waistband are stretch for comfort, and are designed to keep cold out.