The Scarpa Booster climbing shoes are your go-to climbing shoes for steep faces with difficult, demanding holds. The aggressively downturned design and durable synthetic upper allow for sensitivity while the Vibram rubber outsole gives you the durable grip you need to push higher. DTS Tension System climbing shoes employ contrasting tension on either side of the shoe to drive power toward the big toe. Bi-component upper of ceramic microsuede and Alcantara microfiber upper with dual hook-and-loop straps for a locked-down fit. Scarpa M50 rubber is their softest-rated rubber to follow the natural curves of the foot for comfort across the upper and toe-patches. PAF Heel system interrupts the tension-rubber with a softer rubber to reduce pressure across the Achilles tendon. Holes at the side indicate the amount of tension applied: ⢠One hole indicates light tension. ⢠Two holes indicate mid tension. ⢠Three holes indicate strong tension. 1.0 mm Flexan midsole. Vibram rubber outsole provides high durability, grip, and stiffness. Last: FZC. A highly downturned last with a highly asymmetric fit. Vegan climbing shoes due not contain any materials sourced from animals or that utilize any kind of animal testing. Made in Italy. Measurements: Weight: 7 oz Product measurements were taken using size 41 (US Men's 8, US Women's 9), width Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.