Waterproof 6 Layer design material is waterproof and there is no need for extra waterproof mattress pads Handy Pockets Two bigger side pockets and three smaller side pockets are located on each armrest. They are designed to hold books, glasses, cellphone No More Slip There are 8 strings to help avoid sliding, even when using leather furniture. No more straps or foam, allow for a more elegant appearance Material Pet fur doesn't cling to the cover. It can also easily remove pet hairs from the cover and is conveniently machine washable, can be tumble dried