Cotton,Machine Wash. Boxer briefs underwear made from soft fabrics, suit for all season. No ride up leg bands are designed to stay in place, so the kids can play without restraint. The training pants don’t soak up as much liquid as a diaper, they are instead designed to provide some protection against accidents. Different prints are available for children to choose from. these potty trainer boxer briefs are both washable and reusable just like regular underwear.