Includes (1) Mattress Topper Serene foam is not temperature-sensitive and reduces motion transfer Fiber-filled outer cover features COOLMAX moisture-wicking technology Twin Dimensions: 39x75x3” Spot clean only foam; removable cover is machine-washable for easy care 3-Year Limited Warranty Serene is a registered trademark of Carpenter Co.; Comfort Tech is a trademark of Carpenter Co.; COOLMAX is a registered trademark of The Lycra Company; CertiPUR-US is a registered certification mark of Alliance for Flexible Polyurethane Foam, Inc.