Amblers deliver a robust metal-free waterproof hi-leg metatarsal safety boot with quick access YKK metal free side zip. TPU Heel Support is provided for Extra Durability and an Injected PU Midsole delivers comfort. - Safety Standard EN ISO 20345:2011 - S3- Hi-Leg Waterproof Metal Free Metatarsal Safety Boot- Excellent Ladder Grip Outsole and Poron XRD Internal Metatarsal Guard- YKK Metal Free side zip for quick access and release- 200 Joules Fibre Glass Composite Toe Cap- Anti-Penetration flexible composite Midsole - Min 1100N- Energy Absorbent Heel- Removable PU Footbed, Antistatic and Oil resistant Outsole- TPU Heel Support for Extra Durability and Injected PU Midsole and Scuff cap- Internal waterproof membrane- Rubber Outsole Heat Resistant to 300 Degrees