The pro derby pad brings years of roller derby experience from the rink to your knee through the input of top skaters product features have been tested and perfected experience the differenceslim protective washable designed for roller derbyfeaturesdesigned specifically for roller derbylow profile and less bulk with high level protection187 killer pads lock in core systemremovable foam allows for easy washinginterlocking straps link foam to center of pad casingv 22 dual density foamspe