Outlast Bedding Mattress Pads work with your body's temperature to provide ultimate comfort for the best night's sleep you have ever had.Outlast Mattress Pad Dimensions:Twin: 39 inches wide x 75 inches longFull: 54 inches wide x 75 inches longQueen: 60 inches wide x 80 inches longKing: 78 inches wide x 80 inches longCalifornia King: 72 inches wide x 84 inches longDid you know that 70% of adults don't get enough sleep? Some common causes are night sweats, hot flashes, and thermal incompatibility between partners. Outlast technology helps by responding to changes in your body temperature so you sleep better, longer. Our temperature regulating technology is able to absorb, store, and release excess heat when you need it most so you're not too hot, not too cold but just right! Outlast Technology Mattress Pads:300 Thread Count100% Cotton for soft breathable comfort100% Polyester fiberfill provides supportive comfortHypo-AllergenicEasy Care: Machine WashableFits mattresses up to 16-inch deepOutlast Gold Comfort RatingAlleviates night sweats and chills by continually adapting to your changing body temperatureSleep sounder and wake up refreshedMillions of invisible microcapsules (Outlast Thermocules) create a special comfort zone next to your body, absorbing excess heat when you get too hot and releasing stored heat when your body cools downOur Outlast mattress pad features temperature-regulating Outlast Thermocules that help to prevent unpleasant night sweats, chills and discomfort. This innovative mattress pad ensures you'll sleep soundly and wake up feeling refreshed and reinvigorated. Odor-free and hypoallergenic, this Outlast mattress pad takes bedding to whole new level of comfort and quality. Bedding products incorporating Outlast technology continuously interact with the microclimate surrounding your body to moderate temperature while you sleep.® Registered Trademark of Global Web Horizons LLC dba Slumber Cloud Outlast Temperature Regulating Mattress Pad - Twin XL