RP3 Series pro level features, perfect for the club and recreational cyclist. FEATURES. Secure closure system-two hook & loop straps plus a buckle for a firm fit. Off-set Strap relieves tension at highest point of the foot. Supple padded tongue feels great. Optimum pedaling efficiency and compatibility. Lightweight glass fiber reinforced nylon sole. Indoor cycling friendly SPD and SPD-SL cleat compatible. Adaptable Cup Insole. Best Match: PD-R550, PD-R540, . PD-R540-LA, PD-A520 (SPD pedals can be used only with SPD cleats with the adapter SM-SH40). Color: White. Size: 42