Designed to provide unparalleled comfort for all-day cragging and gym sessions, the Momentum is a two-strap Velcro shoe that combines innovative technology with a classic, flat-last design to create an entry-level shoe that excels in performance. With an upper fabric that consists entirely of Black Diamond'sEngineered Knit Technology, the Momentum provides stretch where you need it, support where it matters, and all-around exceptional breathability. At the front of the shoe is a microfiber liner to minimize stretch and maximize comfort.