Poron XRD™ is the market-leading technology in metatarsal protection. A reactive, flexible foam layer that runs from the toe cap along the top of your foot to protect your metatarsal bones from severe damage. AS350C Berwyn is a hi-leg waterproof metal-free metatarsal boot from Amblers Safety. Internal waterproof, breathable Dri-Bloc® membrane. Full lace up front with 100% non-metallic eyelets and industrial strength cord lacing. Metal-free full YKK® side zipper for easy on and off. Water-resistant leather upper with deep padded collar and gusset tongue. 200J impact and compression resistant composite toe cap and anti-penetration flexible composite midsole. TPU heel support for extra durability. Cushioning and energy rebounding dual density PU midsole with scuff cap protection. Hardwearing heat and slip resistant ladder-grip rubber outsole in antistatic construction.