With an upper fabric that consists entirely of Black Diamond Engineered Knit Technology, the Momentum provides stretch where you need it, support where it matters and all-around exceptional breathability. They also 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 by the way they forge their carabiners—versus cut from one sheet of rubber. This is their engineered solution to optimize their 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.