Heavy Duty Vinyl Corner Fitted Twin Bed Mattress Cover Water Resistant Protector Size: 33"X 75" Vinyl 100% Vinyl. 33 X 75 / 39x75 Twin Size Mattress Cover. Easy Care and Cleaning. The Vinyl Mattress Protector is easy to maintain. Simply wipes clean with a damp cloth. Custom made with special deep corners for perfect fit Heavy Elastic on corners Waterproof - YOUR MATTRESS STAYS DRY AND CLEAN. Great for those with kids and pets, or dealing with bed wetting or incontinence. Our soft vinyl mattress cover is cool and comfortable. No Noisy or Crinkly Sounds - Your sleep will be restful and undisturbed on our thin, cool mattress cover that will not change the feel of your mattress.