The Mucky Nutz Butt Fender is a stronger, thicker and re-profiled saddle guard to stop you riding with a soggy rear. This bike mudguard also helps to prevent crud building up the top of your seatpost. At just 30g the Mucky Nutz Butt mudguard is one of the lightest rear mudguards on the market. It’s also extremely easy to fit and remove. When you’ve finished riding simply wipe down the guard and you’re done.  Mucky Nutz Butt Fender Features Fitted as close as possible to back face for optimum muck catching. Prevents the top of your seat post from getting clogged up. Discrete but very effective. Possibly the lightest MTB rear mudguard, at just 30g. No need for separate fasteners, making it easy to fit and take off. Compatible with all standard double steel rail saddles, so long as they don't have any daft bits hanging off the rear. Easy to clean as it's flexible and opens flat. Simply wipe it and you're done.