Bio-Based materials, ESD Certified, Fibreglass Toecap, Fully Sustainable Packaging, PS Rated Aramid Protective Midsole, Recycled Materials, Small Sizes, SR Slip Resistance, Vegan Friendly, 100% Non-Metallic Construction. RF300 Tor features Activ-Step® Bio-Based Footbed: Made from 73% natural rubber and 100% recycled post-consumer polyester sock liner, certified by the USDA BioPreferred® Programme. BLOOM® foam midsole, Solum Bio-Tread™ outsole and Recycled Post Consumer Polyester Laces, Webbing and Mesh: Our recycled polyester supply chain is certified to the Global Recycled Standard.