Giro Xnetic H2O Sock - Charcoal Xnetic H2O socks combine waterproof performance, seamless construction, and breathable fibers in a knit construction for the highest level of flexibility available. The unique three-layer composition fuses our RainGuard membrane between a durable nylon outer shell and hypoallergenic liner, for use in wet weather and temperatures that dip towards freezing. FABRIC: OUTER: 75% NYLON OUTER: 18% ELASTANE OUTER: 7% RUBBER INNER LINING: 85% BAMBOO INNER LINING: 12% ELASTANE INNER LINING: 3% RUBBER