The Serta PerfectSleeper Bed Bug Mattress Encasement utilizes a complete zipper closure, making it bed bug proof. It's StainTech design easily releases stains, while the quiet waterproof technology protects your mattress from moisture. Available in Twin, Full, Queen, King and California King sizes.Included: 1 Mattress Topper(s)Features: Breathable, Stain Resistant, Allergen Barrier, Waterproof, Bed Bug BlockerBedding Closure Type: ZipperManufacturer Warranty: 3 Year LimitedBed Size: TwinMeasurements: 75 Length/Inches, 39 Width/InchesMattress Depth: Up To 15 In DeepBase Material: 100% PolyesterCare: Machine WashThickness: Thickness Not ProvidedComfort Level: BasicProtection Level: MaximumMattress Securing: SkirtMattress Pads & Toppers Type: Mattress ProtectorsCountry of Origin: Imported Serta Bedbug Shield Mattress Encasement