"Meet BrookShield, the mudguard of your wet dreams. With a superb fit and extended reach, it sits perfectly on your BROOKS saddle.
Not only does it save your ass from the wet stripe, it also function as a protector of the leather saddle which otherwise can easily be destroyed by the notorious road spray from your back wheel.
Although developed especially for BROOKS saddles, it also provides a good fit for other similar "old style" leather saddles such as IDEALE, BLB Mosquito to name a few. Choose your BROOKS model from the the drop list above. Does not fit coil spring saddles. For Cambium C17 and C15, please use ASO-3, ASE-1 or ASW-1."