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.Upper Materials: Waterproof 5mm neoprene upperProtective Components: Protective fibreglass toecap and composite anti-penetration flexi-midsoleInternal Linings: Moisture wicking breathable mesh fabric liningOutsole: FORCE10 solid nitrile rubber outsole - tested to extraordinary abrasion, heat and cold performance levelsFootbed: Activ-Step PU anti-fatigue comfort footbedSafety Specification: EN ISO 20345:2011 S5 CI HRO SRCAvailable Size Range: UK 3-13 (INC 6.5 and 10.5)