Stretch-fit topline binding snugs calf to keep warmth in and cold out. CR flex-foam 5mm bootie with four-way stretch nylon. Light-weight and flexible, 100% waterproof. Additional Achilles reinforcement for added protection. Added toe protection with wrap-up bumper. Diamond-textured toe and heel reinforcement resists scuffs and scratches. Rugget, durable two-color MS-2 molded rubber outsole.