With an upper fabric that consists entirely of our Engineered Knit Technology, the Momentum provides stretch where you need it, support where it matters and all-around exceptional breathability. We&';ve 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 we forge our carabiners-versus cut from one sheet of rubber. This is our engineered solution to optimize our 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.