Insulated Mattress Pad - This body heat insulating mattress pad features reflective metallic insulation to capture your body heat and keep you warm naturally. Both layers of unique metallic insulation naturally reflect your body heat back towards you to prevent heat loss while you sleep. Don't worry about breaking your back either, this lightweight sleeping pad features advanced polyester micro plush technology to keep you warm without breaking a sweat to set it up. Advanced Sleep Technology - Sleeping on an air mattress doesn't have to be chilly! The Alki Twilight Thermal Mattress Pad helps prevent heat loss while sleeping on an inflatable air mattress. Air mattress insulation only works if the sleep mat can successfully send colder air below while reflecting your body heat back towards you. That's why you need the cold weather sleeping pad designed to do exactly that with the Twilight Premium Mattress Topper.