Twin Size Mattress Or Box Spring Encasement (8"-11" Depth) Waterproof Zippered Four Seasons Essentials six-sided zippered mattress protector fully encases your mattress or box spring on all sides and offers protection against liquids, moisture, dust. Our Premium mattress protectors are hypoallergenic, noiseless and made of soft breathable fabric. Fits 8" to 11" Deep Twin Mattress Or Box Spring. Get One for Mattress and Another for Box Spring. SIX SIDED ZIPPERED ENCASEMENT - Completely encases your mattress on all sides. Our premium zippered encasements are equipped with a Velcro zipper seal to ensure that nothing gets in! Say good-bye to troublesome pets that can ruin your mattress and bring discomfort to your life. Take precaution and sleep worry-free knowing that your mattress is shielded and protected. Be smart and protect your investment with a quality mattress encasement! WATERPROOF - Whether you have pets or kids, accidents and spills happen. This 100% waterproof mattress protector has a polyurethane inner lining that blocks liquids and moisture from getting in. Liquids easily seep through to deeper layers of your mattress and are almost impossible to remove. Simply wrap your mattress in our premium cover, zipper seal all the way around, and your mattress will remain waterproof, dry and protected! SOFT NOISELESS - Stretchable, breathable fabric keeps liquids and contaminants out without compromising comfort. Designed to be soft and completely noiseless, you will not see or hear crinkles under your sheets. With our high quality mattress protectors, you are shielded from irritating contaminants that can sneak into the deep layers of your mattress! Seal out dust, pet hair for good! EASY INSTALLATION - Our mattress covers have a full zipper that wraps all the way around three sides of the mattress. No more struggling squeezing your mattress into difficult encasements, simply place your mattress in the sealed end and zip all the way around it for a perfect fit. DURABLE LONG LASTING - Made of high quality polyester (surface) and polyurethane (inside lining). This six-sided stretch fabric zippered mattress encasement is built to fit any Twin / Single size mattress that is 8? to 11? deep. Machine washable for easy cleaning and lasting use.