The Patagonia Men's Synchilla Snap-T Pants was invented for those who cant migrate south to escape winter; they are soft, warm and livable. Theyre made from plush, 100% polyester fleece (80-85% recycled) that dries quickly, wicks moisture and is smooth against the skin. With an elasticized waistband, exterior drawstring and spandex binding at the cuffs. They perform equally well when worn alone or under shell pants. On-seam handwarmer pockets and a classic rear Snap-T pocket hold lifes little necessities.