The mebby liner pack monster is a lovely soft towelling changing liner which is completely machine washable so if there are any accidents you can simply place in the machine and wash and dry these are made with soft towelling on one side for the comfort of your baby or child to lay on whilst changing or just to let baby have the freedom of no nappy on you can use these liners with or without a changing mat allowing baby freedom to lay down without a nappy on or simply to use when changing b