H2Odyssey 3mm Neoprene Sock with Extra High Ankle & Traction Sole

3mm neoprene for heat-retaining warmth Extra-high ankle for extended protection Velcro strap for adjustable fit PVC sole is sticky for better traction The H2Odyssey Ultrasock is a heat-retaining sock for underwater activities and water sports.   3mm neoprene material provides warmth and locks in body heat for comfortable swimming, while the extra high ankle extends warming protection up into the ankle and lower calf.   The PVC sole is sticky for stronger traction, and the Velcro strap allows for a snug fit that won’t slip down.