100% non-metallic, with protective toecap and midsole, Tanzanite is comfortable and lightweight, it’s developed with specialist durability materials including an Activ-Tex® waterproof membrane and shock-absorbing EVA nitrile rubber outsole. The Rock Fall womens range is made on a womens shoe mould making it more slender and better fitting. Rock Fall Tanzanite Womens Fit Waterproof Safety Boot