This is a pair of Race Face Carbon Crank Boots. Saving your beautiful, (and expensive), carbon cranks from all of those pedal strikes is something you should think about well before they happen. It isn't an "if", it's a "when". So be prepared and snap a couple of these bad boys on the cranks so you can charge without a worry and when you sell those cranks to your buddy in a year or two, you can smile confidently that they are like new. Made from durable Race Face proprietary plastic blend. Available in a multitude of colors to suit your style. Fits Race Face Next/Next SL, SIXC, Respond, SRAM XX, XO, Noir, FSA Gravity and Gravity Lite and Shimano Saint