Boa Closure System. Sock-like Fit. ShapeShifter Technology. Fully conformable to your foot. Fully conformable to the trail. Cushioning + stability. WEIGHT : 8.3 oz. (235g) - Half Pair. LAST : ShapeShifter 6. UPPER : 3D Stretch Mesh, Synthetic. FOOTBED : Fixed 4mm PU Foam. MIDSOLE : Injection Molded EVA. OUTSOLE : Vasque Morpheus. 28mm heel-22mm forefoot-6mm drop.