Rock Fall RF3300 Iris Women's Metatarsal Safety BootProduct description 100% non metallic, with protective toecap, midsole and internal metatarsal guard, Iris has been crafted specifically around a women's foot shape to give a genuine women's fit, it is developed with specialist durability materials including solid nitrile rubber outsole, an Activ Tex waterproof membrane and IMPACT SHIELD metatarsal protection. Currently the only Internal Metatarsal Boot on the market, designed exclusively for women