The Rock Fall wellington is beyond your expectations this super comfy product has 100% non metallic it also has proactive toecaps and a midsole.The Silt is highly robust and developed with specialist durability materials including FORCE10® componentsUpperWaterproof 5mm neoprene upperProtectiveProtective fibreglass toecap and composite anti-penetration flexi-midsoleLiningMoisture wicking breathable mesh fabric liningOutsoleFORCE10® solid nitrile rubber outsole – tested to extraordinary abrasion, heat and cold performance levelsFootbedActiv-Step® PU anti-fatigue comfort footbedStandardsEN ISO 20345:2011 S5 CI HRO SRC