The Revo XR3 shoes have a ventilated nylon outsole with interchangeable insoles to let air in or keep it out depending on the time of year. Three straps with ratchet feels achieve a perfect fit. Heel is reflective for visibility when riding before or after daylight hours. Double position ratchet closure. Ergo Air Hot Stuff red insoles for cold temperatures NOT INCLUDED. Heel reflector for enhanced visibility. Visual display of cleat position compatible with DURA ACE, SPD, TIME, LOOK, and SPEED PLAY.