Ensure your mattress stays protected and organized during your next move or storage period. Firmness: Mattress Bags Size: Twin Type: Mattress Bags Color: Gray. Unit Quantity: 1.0 count Features: Washable,Waterproof,Easy to move,Extra Thick,Heavy Duty Handles,Zipper Closure,Double Strong Zipper,ID Card Slot,Reusable,Eco-Friendly Material,Anti-Friction Cover Cover Material: Polyester,Polyethylene Labels & Certifications: Mattress Bags.