adidas Five Ten Kestrel BOA Mountain Bike Shoes - Blue 。Transfer maximum power to the pedals. The Kestral Pro Boa combines our stiffest sole and clipless compatibility for an efficient all-mountain ride. The Boa Fit system means you can dial in a secure fit, while the wide Stealth C4 rubber sole provides confident footing in all terrain. Mesh inserts enhance breathability, and the quick-drying synthetic upper maintains all-weather comfort. - Boa Closure System for micro-adjustment, and secure and consistent hold - Mesh inserts enhance breathability, and the quick-drying synthetic upper maintains all-weather comfort - Stealth C4 rubber sole provides confident footing in all terrain - Durable, lightweight EVA midsole - Enjoy the comfort and performance of OrthoLite sockliner - Regular fit, clipless style