The Everett S3 is a non-metallic waterproof safety boot that offers cold insulation up to minus seventeen degrees. It is Thinsulate lined for cold insulation that can resist up to -17 degrees. The waterproof, full-grain leather upper keeps feet dry and protected, and provides long-term durability. It features a tough and durable rubber outsole that provides excellent grip, and a composite toe for great protection that is non-metallic and lighter than traditional steel. The boot offers energy absorption, is puncture resistant, and has a heat resistant outsole. Its non-metallic construction makes it ideal for those working in aviation. It also has a molded TPU scuff cap and heel guard for enhanced protection, and a molded EVA midsole that offers additional shock absorption and all-day comfort. The boot is antistatic. Upper: Leather; Lining: 3M Thinsulate & Mesh; Sole: Nitrile Rubber. Heel Height: 2.0 cm. Safety Standard: EN ISO 20345:2011; Safety Rating: S1; Safety features: E HRO SRC FO.