Super lightweight, waterproof socks from DexShell, made with Bamboo The DexShell Ultra Thin Sock 100 waterproof and highly breathable. In order to achieve this, these crew socks feature a 3-ply construction 1 The inner sock from a 60 bamboo rayon40 nylon blend. Bamboo has natural antibacterial properties, which help to eliminate odour. It also highly absorbent and helps to move moisture out of the sock. 2 The interlining made of a waterproof and breathable Porelle membrane, which a functional high-performance microporous membrane that light, flexible and durable.3 The outer sock made of 37 Nylon, 32 Modal, 28 Cotton, and 3 Elastane. The combination of these fabrics makes for a lightweight yet cushioned sock with a blister-free fit.With its light cushioning and warmth rating of 1 out of 5, the DexShell Ultra Thin ideal if need a waterproof sock with little insulation. It can be used for running, walking and hiking, and especially suited for use in warmer temperatures. They promise to keep moisture and blisters at bay and actively expel sweat through the 3-layer construction, all the while maintaining a comfortable temperature for your feet.