Waterproof Box Sheet, Bedwetting Sheet, Nursing Sheet, Bed Sheet Queen: 160*200*30cm I purchased this on Rakuten for 3080 yen, but it doesn't fit my queen-size mattress, so I haven't used it. (Those who have a queen-size mattress purchased from Nitori, please be careful.) I tried to put it on somehow. Also, I threw away the packaging. I can't fold it well, so I will fold it as small as possible and ship it in a bag. [Completely Waterproof Specification] The back side uses a highly breathable TPU waterproof membrane to increase waterproofness, and even if you spill sweat or water, the moisture will not reach the mattress. It will firmly prevent water from soaking into the futon or mattress, as well as stains, for nursing care and bedwetting. It's very useful when sleeping with children or pets. The side parts are also waterproof, preventing water from leaking sideways.