The Granite is a mining boot featuring a unique Metatech System Flex internal metatarsal protection, composed of a lightweight PU foam cushion that absorbs impact and a super-flexible, comfortable TPU shield that protects the top and side of your foot without sacrificing the boot's suppleness and flexibility. Waterproof, lightweight, hyper-comfortable and breathable, it also offers great grip on wet and icy surfaces thanks to its Vibram Fire & Ice sole.