Unisex yard boot. Snug Ankle Fit. 5mm CR flex-foam bootie with four-way stretch nylon. 100% waterproof, lightweight and flexible. Seamless, full coverage, quick-clean rubber overlays. Additional Achilles reinforcement for added protection. Durable, lightweight rubber outsole. Steel shank for additional arch support. Wide-cut heel base for stability. Temperature rating: 0C to 30C. CR Flex-Foam adjusts to the unique contours of your foot to create a comfortable and stable foundation while resisting blisters and chafing. Upper: Rubber/Neoprene. Lining: Textile. Sole: Rubber. Ref: UTFS4313