Features of the Pearl Izumi Women's X-Alp Elevate Shoe Advanced 3-Layer Seamless Composite Upper delivers all-day riding comfort and durability Zonal Bi-directional Closure wraps the foot for a semi-custom Fit and secure foot retention Boa IP1 reels allow 1 mm micro-adjustability and pop up for full release Nylon/carbon composite shank for efficient power transfer and off-the-bike versatility Lightweight EVA Midsole for off-the-bike cushioning and all-day comfort Aggressive lugged Vibram Megagrip compound Outsole for superior traction and durability SPD Compatible