Ass Savers Smartass Bicycle Rain Fender The Ass Saver - a light weight emergency fender that sits quietly and almost invisible under your saddle, ready to deploy whenever the streets get wet Proven and tested in the field, it's a simple solution to the annoying brown stripe down the back of your pants Compatible with almost every standard rail saddle thanks to our new patent pending attachment system When not in use, it can be folded up and stored underneath your seat, ready to be deployed the next time you are caught out in a shower Whether you're urban shredding, winter training or just prefer to keep your behind unsoiled, the SmartAss is your new best friend