The Serta PerfectSleeper Cool Crystal Mattress Protector has a cooling comfort design. It's cool-to-the-touch and waterproof to keep you cool, dry and comfortable. With a patented Simple Fit® skirt, this mattress pad snugly fits mattresses up to 18" deep. Available in Twin, Full, Queen, and King sizes. Features: Breathable, Cooling, Allergen Barrier, Waterproof, Moisture Wicking Manufacturer Warranty: 3 Year Limited Thread Count: 230 Bed Size: Twin Measurements: 75 Length/Inches, 39 Width/Inches Mattress Depth: Up To 18 In Deep Base Material: 70% Nylon, 30% Polyester Care: Machine Wash Thickness: Thickness Not Provided Comfort Level: Basic Protection Level: Maximum Mattress Securing: Skirt Mattress Pads & Toppers Type: Mattress Protectors Country of Origin: Imported