Amazon.com: Fizik Tempo Powerstrap R5, Innovative Cycling 。NWOT Fizik Unisex-Adult Tempo Powerstrap R5 Cycling Shoes Size EU 37 US Men\'s 5.5 New without tag and box Never worn in excellent condition A versitile road cycling shoe with a foot- wrapping Velcro closure that provides an enveloping fit and an R5 outsole that delivers a balance between comfort and pedaling efficiency. POWERSTRAP While most Velcro closures simply pull together two sides of the shoe\'s upper, in this configuration a ribbon wraps around the foot, enabling ultimate comfort and containment using just two straps. VOLUME CONTROL In this way, the system replicates the principle of Fizik\'s Volume Control: the instep and the midfoot are separately adjustable areas that provide a fully customized fit and compression. R5 OUTSOLE The R5 Nylon composite outsole is supple and comfortable even in the long haul but without compromising pedalling efficiency.