... cap + Steel midsole PVC safty working boot for industry and mine 1 PVC+Specialmaterial 100% waterproof, anti-bacterial, anti ... temperature proof No shrinked and hardened with cold No expanding with heat 4 Height:400mm Protect the ankle and shin 1 Steel toe ... in oil fields, colliery metalwork, chemicals, medicine industry, architecture and in the work environment that should protect the workers' feet ...