Danner’s Striker Bolt provides unprecedented responsiveness, comfort and stability. The Striker Bolt was built from the ground up to grip, on and off the pavement. Specially designed lug pattern is engineered for maximum surface contact and excellent slip resistance. The durable full-grain leather and nylon upper soaks up abuse while the GORE-TEX waterproof membrane keeps your feet dry and comfortable. The Vibram SPE midsole provides energy rebounding performance that cushions underfoot, but is more abrasion resistant and durable than traditional EVA.