Spring forward with our thinnest waterproof sock. Made-from-pulp, biodegradable Modal and bamboo rayon yarns, the DexShell Ultra Thin socks give excellent comfort with a supple feel, and provide breathability in the warmer climates. Constructed with our patented 4 way stretch lamination technology 100% waterproof, windproof and breathable Soft Bamboo lining for comfort, temperature regulating and blister prevention Great everyday reliable sock COMPOSITION: Outer: 32% Modal, 37% polyamide, 2% elastane, 29% cotton Interlining: Porelle® membrane (Polyurethane) Inner: 60% bamboo rayon (viscose), 40% polyamide