Breathable mesh and TPU upper with 100% recycled laces and straps 100% recycled breathable mesh lining and mesh insole Rock plate for added protection and forefoot and heel pads for comfort The super rebound compound provides long-lasting shock absorption to help reduce torque and allow for a smooth transition to the midfoot Vibram TC5+ outsole technology gives you confidence in every step, from mountain trails to city streets. Made exclusively for Merrell, Vibram TC5+ offers complete grip, traction and durability, designed for everyday use.