Carefully Crafted Comfort. Ultra soft, Ultra Thin, Ultra strong Bamboo + Cotton Fabric blend with gel heel grip to prevent any slipping. ZERO COMPROMISE CRAFTSMANSHIP. We designed these socks to provide all the benefits of no show socks with none of the sacrifices. Added forefoot mesh ventilation area for ZERO HUMIDITY & Increased breath-ability. SEAMLESS TOE. Ultra strong double yarn double thread count sock bottoms to prevent any ripping or tearing ZERO POINT SOCK WELT. Only ZeroSock uses a Zero Point Sock welt to keep your socks from falling down or sliding. The sock welt is designed to comfortably cling to your foot.