Showers Pass 100% Waterproof Breathable High Visibility Multisport Unisex Crew Socks CONSTRUCTION Three layer bonded construction sandwiches a Polyurethane waterproof-breathable membrane (Showers Pass Proprietary Artex Membrane) between a wear resistant, High Visibility knit exterior and a moisture-wicking, anti-bacterial Coolmax lining WATERPROOF The Artex Membrane is an ultra-thin PTFE Waterproof Breathable Membrane whose molecular structure allows the membrane to stretch while the pores of the membrane do not. This provides a reliable level of waterproof and breathable protection so your feet dont overheat during athletic activities. COMFORTABLE These seamless, waterproof-breathable socks keep your feet dry and comfortable in wet conditions without adding bulk or sacrificing comfort  no plastic bag feeling like other waterproof socks VERSATILE Suitable for cycling, running, hiking, golfing, fishing, kayaking, rafting, snow sports, and other outdoor activities GUARANTEE Our waterproof membrane is seamless and is formed in the shape of 3-D foot not a flat plywood foot shape. This offers a better fit and feel with no seam-like ridge on the socks. After the three layers of the sock are bonded together, each sock is pressure tested to ensure it has no leaks. A wide toe box and padded toe and heel provide excellent cushioning and durability.