I bought my first pair of these trunks about a month ago, and have to say, I liked them so much, I bought 2 more pairs. I never thought I would have to worry about losing my butt as I  got older, but, sadly, it's all part of getting older. Rounderbottom helps keep my trousers up by giving me the padding that I lost over time. Plus, they make me look like I have the butt of a much younger man! So glad I found these on amazon! One question though. Hoe do you replace the foam pads after some use. I already have on tha is ripping apart jut from normal wear. Are they sold separately and how much are they?