With an upper fabric that consists entirely of our Engineered Knit Technology, the Momentum Lace 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 durability and comfort. Designed for all-day comfort on moderate routes, boulders or gym sessions, the Momentum features a soft-flex midsole for sensitivity and lace-up adjustability, making it the perfect entry level climbing shoe.