Black Diamond Men's Momentum Climbing Shoes While the Momentum climbing shoe was built with ultimate comfort in mind it excels in performance. With Engineered Knit Technology for exceptional breathability and innovative proprietary molded rubber, the Momentum is the perfect entry-level climbing shoe for all day comfort at the gym or crag. Features: Neutral, flat last for vertical climbing or all-day comfort Engineered Knit Technology upper provides exceptional breathability and comfort 4.3mm rubber is built for durability and molded for optimal consistency and performance Soft flex midsole for added sensitivity and comfort Two Velcro straps for fit adjustability