Nylon & Lycra Spandex Imported Pull On closure Hand Wash Only Stays in Place: The Nekkid Comfort Socks have three zones of stay-in-place technology that doesn’t allow the sock to slip in your shoe. Light compression around the arch prevents rubbing and pulling while the hypo-allergenic silicone bands grip the top of the heel. Performance Features: No stink. Spiral woven mesh air-vent top panel that makes the socks breathable and moisture wicking. 360 degree blister protection. Comfort & Fit: The seamless toe and anatomical left/right foot design are shaped to fit your feet. Light compression allows for a close-to-skin fit. Quality: Made with the highest quality Nylon and Spandex combination, these socks are moisture-wicking, which makes the socks odor controlled and breathable. Satisfaction: OS1st products are backed by a 100% customer satisfaction guarantee. With proper care, hand washing and air dry, OS1st products are made to provide lasting support for up to six months.