NOTE: When using the mattress for the first time, air intake will be slow. Self-inflation is usually only at 80%, if you want a very full 2.56 inches thickness, you will need to make up a little air at the end with an air pump of no more than 4Kpa. Please do not over-inflate this will cause bulging UNIQUE FOAM CUT CONSTRUCTION: The Naturehike Car Sleeping Pad is filled with slow rebound foam that conforms to your body's curves and provides extra support for your lower back, hips, shoulders, neck and legs. The unique foam cutting process makes the mattress lighter than other mattresses of the same size. Weight: 2 kg / 4.4 lbs. Also, the smaller storage volume makes it easy to take on the go ENJOY A QUIET AND COMFORTABLE SLEEP: Sleeping pad consists of 5 layers structure, fabric elastic fabric, quiet and skin-friendly; the next layer is TPU airtight layer, locking the temperature and keep dry; in the middle is high rebound sponge, providing more support; the last is TPU airtight layer and pongee fabric, tear-resistant and more durable WIDE RANGE OF USAGE SCENARIOS: The size of the car mattress is 197*134cm/ 77.6*52.8''. You can fold the air mattress after pumping and then roll it up, tie it with a strap and then put it into the storage carry bag. The carry bag can be carried or carried on your back, convenient for you to go to the following scenarios: camping / outdoor / home / travel / car UNIQUE TWO-WAY INFLATION VALVE: Two-way inflation valve, only one layer can be opened to inflate and prevent air leakage, and both layers can be opened for quick deflation. The unique design helps you to adjust the softness of the mattress by yourself. Note that the first time you use the mattress, the air intake will be slow, the self-inflation usually only reach 80% of the level, the last need to make up a little bit of air. Do not over-inflate NATUREHIKE VALUES YOUR EXPERIENCE: We want you to experience great value for money and great service. If you encountered the air cushion leakage or bulging problem please contact me through Amazon, will give you a satisfactory solution! Meanwhile, we promise one year product warranty. Thank you for your trust in us Naturehike 2.56’’ Thick Self-Inflating Foam Camping Mattress for Car, Compact Sleeping Pad For Camping, Outdoors, Travel, Home