Jersey Knitted Polyester SIZE & DEPTH: This Guardmax Mattress Encasement fits a Twin XL Size Mattress that measures 39 x 80 x 10. It stretches to fit a mattress with a depth up to 11 inches. JERSEY KNITTED: The Guardmax Mattress Encasement is jersey knitted in order to combine protection with comfort. The TPU Laminate makes the mattress protector fully waterproof and the jersey knitted polyester fabric makes the mattress encasement soft and comfortable to create a relaxing night's sleep. 100% WATERPROOF MATTRESS PROTECTOR: The Guardmax mattress protector does exactly that. It protects your mattress against any and all liquids. Whether it is a drink or urine no liquid spill will penetrate through the TPU laminate membrane. BED BUG PROOF MATTRESS COVER: Many mattress encasements make the claim that they are bed bug proof. Only Guardmax makes that claim and backs it up by being manufactured in an EPA Registered Facility. Our nylon coil zippered encasement is state of the art to ensure nothing gets in or out once the mattress has been sealed shut. ZIPPERED MATTRESS PROTECTOR: The Guardmax Mattress Protector is made with a nylon coil zipper, which will prevent the zipper from trapping or snapping as is the case with other mattress encasements on the market. If there was such a thing as state-of-the-art zippered technology. Guardmax's mattress encasement would be it. It is a zipper made with durability in mind. SOFT AND BREATHABLE: Made from a high quality jersey knitted polyester, the Guardmax Mattress Cover is soft, breatheable, and extremely comfortable. Gone are the days of feeling like you are sleeping on a plastic mattress case and welcome to full protection without compromising on comfort. HYPOALLERGENIC: The Guardmax Mattress Encasement protects against dust, dirt, and dander. When you go to sleep on a Guardmax Mattress Protector you can don't have to worry about sneezing throughout the night anymore. Sleep allergy free with Guardmax. EASY-TO-INSTALL: You may need two people to lift the mattress upwards, but besides that our mattress encasement easily slips on the mattress 1-2-3 without any troubles or headaches and when you need to take it off to wash it slips off just as easy. EASY-TO-WASH: Simply handwash or put on one quick load and all stains, dust, dirt, and dandruff will fall off with ease. Guardmax Mattress Encasement is a waterproof and bed bug barrier mattress encasement. The Guardmax Mattress Protector comes in the following sizes; Queen, Short Queen, King, California King, Full, Full XL, Twin, Twin XL, RV (48" X 75"), and Cot (33" x 75"), Crib, and Mini Crib. The Guardmax Mattress Cover has a durable and air tight zipper made of nylon to ensure it won't snap or trap easily. It is currently offered in the following colors; white, blue, and gray.