Silver Rest Cool Comfort 12-Inch 3-Layer Gel Memory Foam Mattress, Twin Extra-Long Size Brand new cool comfort technology features state-of-the-art gel infused memory foam Three layer memory foam construction, specifically designed to keep hot sleepers cooler throughout the night Covered with a soft, luxurious stretch knit fabric Provides the perfect balance of luxury, comfort, and a cool night's sleep Twin ebytra long size mattress 80-inch by 38-inch by 12-inch