Little known fact: Yeti feet are perfect for rock climbing. Their durable, but sticky skin acts like natural climbing shoes and helps them scale the most technical routes. • 100% combed and ring-spun cotton (heather colors contain polyester) • Fabric weight: 4.2 oz (142 g/m2) • Shoulder-to-shoulder taping • Unisex sizing, big dudes size up, petite gals size down.