An ankle-length, fully breathable sock, with Hydrostop. 100% waterproof, our lighter socks are perfect for running, hiking or any activity.The Aquasealzmembrane releases body-generated heat and moisture, while denying the entry of water. Natural bamboo lining has strong moisture-wicking properties. Hydrostopprevents water trickling down leg into top of sock. *In very rare cases, close bond between sock cuff and skin may lead to rubbing.TechnologyOuterExtra-durable nylon exterior, with 4-way stretch for an optimal fit.Mid-SectionAquasealzmembrane is 100% waterproof. Also highly effective in the release of moisture vapour from inside the sock.InteriorBamboo lining for added moisture control.A seamless construction, with elastic support on the ankle, providing a close fit.Hydrostop- Hydrostopis an elastic taping around the inside cuff of the sock. This extra barrier reduces the risk of water dripping down the leg into the sock.Sealskinz accessories are made for trailbl