Whether you're motoring up through switchbacks or cruising back down with your mind on a cold brew, the all synthetic Switchback will keep your feet cool and comfortable. Synthetic leather upper with high abrasion textile mesh. Dual density propulsion foam. High friction outsole. Anatomically engineered footbed. The Oboz Radial Fit System stabilizes the mid-foot on uneven terrain and reduces the likelihood of roll-over and twisted ankles. 11. 00 oz. Product measurements were taken using size 6. Please note that measurements may vary by size.