The world’s toughest shoe for running the world’s toughest long-distance trails. Revolutionary graphene-enhanced rubber delivers the world’s toughest grip on hard-packed trails, while next-generation underfoot technology strikes the perfect balance between comfort and responsiveness. Materials including Kevlar – commonly used in bulletproof vests – give high levels of durability and breathability to the upper of a 260g shoe that is biomechanically designed to enable the natural movement of the foot.