Stretch Knit Polyester Dust Mite & Allergy Control Twin 12-inch Deep Pocket Mattress Protector allows you to encase your mattress as an integral part of your allergy prevention solution. 100% polyester is laminated to a urethane membrane which is an effective barrier to dust mites and allergens. The weave of the fabric, which is a circular knit polyester, has a satin like feel and is very smooth and cool to the touch. It is latex free, water proof and is made in the USA. The twin size measures 39 by 75-inch and is easy care machine wash and dry.