Clipless shank Impact-resistant toe box Imported The Five Ten Kestrel BOA is a dedicated downcountry shoe that unites XC efficiency with adidas Five Ten's footwear excellence. A full-length plate made in part with repurposed materials and reinforced with glass fiber provides excellent power transfer with added pedal stability. Engineered for the most demanding rides, the Kestrel BOA is the shoe of choice for the modern rider.