Amazon.com: Arc。Mountain running shoe designed to climb through technical vertical terrain. Run your climb in this progressive hybrid shoe that combines the specific requirements of climbing into the efficiency of a mountain running shoe. Fly up technical ascents and comfortably back down thanks to a zoned outsole that grips hard rock surfaces and provides traction on soft trail terrain and shock-absorbing underfoot cushion that keeps you feeling stable and lets you feel the ground beneath your feet. Abrasion-resistant Matryx® woven polyester upper is durable, lightweight, breathable, and flexible Tongue pocket secures the laces, eliminates lace bounce, and prevents snagging Flexible laminated TPU reinforcement zones add protection & abrasion resistance Stretch materials extend from collar to U-throat for a precise sock-like fit Mapped dual-density midsole construction combines softer heel and midfoot cushioning for running comfort with firmer forefoot support for rocky terrain integrating optimal response & performance Highly breathable integrated stretch gaiter helps seal out debris and moisture Offset (Stack height): 7mm (23mm : 16mm) Zonal lug patterns designed to provide forefoot grip while smearing with comfort & surefootedness on the trail outsole construction Vibram® Megagrip outsole with LITEBASE technology delivers durable, surefooted performance across a range of conditions while shedding every gram possible Forefoot TPU film provides underfoot protection and improved stability