Kleer-Guard Twin Size - Thick 2-Mil Mattress Bag - Fits Standard and Pillow-top - Protect Against Dust, Spills, and Stains - 52x14x91 Inch Clear, mattress bag made from plastic (polyethylene). Enhanced strength 2 mil plastic. Help protect your mattress against dust, spills and stains. Use for large cushions or pillows. For moving or temporary storage only. Reusable.