The RF910 Surge is packed with safety features that has been designed to be sustainable to its core. It features recycled plastic bottle upper, webbing and lace materials that are durability rated, including an Activ-Tex® Waterproof membrane that is breathable, tested for 8 hours and also contains 60% recycled content. Certified to withstand electrical risks of 18kV in accordance with the ASTM F2412-18 test method. It has a 100% non metallic construction, including a fibreglass toecap and composite midsole. The outsole complex is a dual density PU nitrile rubber outsole which offers unbelievable abrasion resistance whilst providing exceptional shock absorption and weight reduction. Electrical Hazard 100% Non-Metallic Construction Heat Resistant Outsole to 300°C Ladder Grip Oil Resistant Protective Midsole & Toecap SRC Slip Rated Water Repellent Upper Cold Insulation Sustainable. Maximum Protection & Durability: Designed for tough environments, these boots features a protective fibre glass toe cap that resists impact and compression with 200 Joules of protection, equivalent to a 20 kg object dropped from 1 meter or 1.5 tonnes of pressure. Manufactured to exceed EN ISO 20345:2011 S3 SRC standards, ensuring top-level protection. Certified to withstand electrical risks of 18kV in accordance with the ASTM F2412-18 test method. Waterproof Construction: An Activ-Tex waterproof membrane bootie, using 60% recycled post-consumer polyester, keeps your feet dry in wet conditions while contributing to a reduced environmental footprint. Advanced Anti-Penetration Performance: The exclusively crafted para-aramid anti-perforation protective midsole developed by Activ-Step Footwear Components provides essential on-the-job safety. Increased Durability: Extra protection from scrapes and abrasion with a TPU scuff-resistant heel counter and in-built PU scuff-resistant toe cap. Its fibreglass toe cap shields your toes from a minimum of 200 joules of impact, offering peace of mind on any worksite. All day comfort comes from an Activ-Step PU anti-fatigue comfort footbed.