First trunks/short boxer briefs that don't ride up, slide up, bunch up, creep up, or any other kind of up ! These trunks have a wide elastic type leg band that keeps them in place all day. The shorts also seem to be made of a slightly heavier material than most, and besides good underwear they are a good base layer for all sorts of activities. My only concern is that they seem to run small, so go up a couple of sizes !