100% non-metallic, with protective toecap and midsole, Silt is highly robust and developed with specialist durability materials including FORCE10? components, an Activ-Step? PU footbed and 5mm neoprene upper. EN ISO 20345:2022 A1:2024 S5S CI HRO SC AN FO SR UK 3-14 (INC 6.5 and 10.5)