Product Description ・Automatically expands with extra-large bubbles ・Effectively covers cold from the ground and unevenness in the car ・Can be connected with two or more Contents Mattress body x 1, Bands x 2, Bag x 1 Size Width 201cm x Depth 70cm x 5cm I purchased this for car camping, but I am selling it because I am replacing it. The instructions for use are sewn onto the bag. Used once in a car. Used under a sleeping bag.