A must-have for the parents of baby boys, the Weeblock Copack MVPee & No. 1 from SOZO is a wee-wee-absorbing sponge for use when changing nappies. Weeblock was invented by the parents of two boys who have developed a useful and fun solution to the inevitable "fountains of youth." Just cover the baby during changing with the Weeblock and stay dry. Weeblock is a machine-washable sponge covered in soft cotton jersey.