The Momentum has an upper fabric that consists entirely of an engineered Knit technology which provides stretch where you need it, support where it matters and all-around exceptional breathability. There is an added a micro-fiber liner to the front of the shoe to minimize stretch and maximize comfort. The Momentum’s durable rubber is unique in that it’s molded— inspired to the way Black Diamond forge their carabiners—versus cut from one sheet of rubber. This is an engineered solution to optimize the shoe’s rubber and rands for weight, consistency and comfort. Built for all-day comfort on moderate routes, boulders or gym sessions, the Momentum features a soft-flex midsole for sensitivity and is the perfect entry level climbing shoe.