The Healthy Sleep mattress encasement is made to do just what it says—encase your mattress so that you and your family can enjoy safe and healthy sleep. This lab-tested mattress cover is allergy proof, waterproof, and breathable. It's made of an antimicrobial fabric that stops both bed bugs and dust mites. Slip your mattress inside and zip it up and you're ready to sleep in peace. The Healthy Sleep mattress encasement will not change the feel or support of your mattress and is machine washable.