Ultimate Shield Mattress Protector - Infinity Series up to 12" Deep Mattress (Twin) Polyester Imported Ultimate Shield Waterproof and Spill Proof Technology Zippered Protector Expands to 9" to 12" 100% hypoallergenic. Blocks Bed Bugs and Allergens Soft Micro Texture and Vinyl lining for Ultimate Protection and Breathability Machine Washable