I purchased these to go inside the Rounderbum boxer briefs based on reviews that I read about the pads that came with the Rounderbum briefs. After having them for a couple of weeks now I can truly say that they are amazing! They definitely help fill out your backside while never looking fake or unnatural. I would highly recommend them to go with the Rounderbum boxer briefs any day! (According to my fiance', it was a definite improvement! :)