Pearl Izumi Men's X-ALP Launch II Cycling Shoe 100% Synthetic and Textile Imported Synthetic sole Bi-directional closure: delivers a semi-custom fit by gathering equally from both sides for even foot retention, with the precision of a micro-adjustable boa reel Carbon fiber injected composite shank for efficient power transfer, low cut construction for a light, fast fit and feel Eva x-alp outsole/midsole for off the bike cushioning and comfort and on the bike power transfer Carbon rubber lugged outsole for superior traction and durability Spd compatible