Completely Surrounds Box Spring To Block Out Liquids Bed Bugs Dust Mites And Allergens Fabric Surface With 100 Waterproof Layer Zipper Closure For Complete Encasement Machine Washable And Dryer Safe Twin Xl Size Includes 39 By 80 Encasement 10 Year Warranty 9 Depth Features: Allergen Barrier, Breathable Bed Size: California King Measurements: 84 Length/Inches, 72 Width/Inches Base Material: 100% Polyester Care: Machine Wash, Tumble Dry Protection Level: Moderate Mattress Pads & Toppers Type: Mattress Encasements Country of Origin: Imported