Insta-Bed Standard Air Mattress with Never Flat Pump Two pumps in one bed, the patented neverFLAT pump system silently keeps your airbed inflated all night neverFLAT pump ensures sweet dreams for you or your guests - just select your desired firmness (plush, medium or firm) and the system will monitor the internal air pressure of the bed, silently engaging a secondary pump to maintain your comfort settings 48 circular coils create a comfortable and supportive sleeping surface automatic shut-off feature turns the Primary Pump once the bed is fully inflated or deflated, allowing you to turn on the pump and walk away without worrying about the pump getted burned out Carry Bag Included Queen Inflated Dimensions: 78" x 60" x 9", Twin Inflated Dimensions: 74" x 39" x 9" Please inflate your mattress according to the included instructions. Note that the material may stretch during the first several uses.It is recommended to inflate your bed at least 1 hour prior to using or measuring it.Extra air may be required after this period to achieve full firmness. For items featuring the NeverFLAT pump system, this extra air is added automatically. All mattress measurements should be taken from the center of the bed surface. For width and length, measure across the bed from the center of each side from widest point to widest point.For the height, measure at the center of the longest side from the ground to the highest point of the bed surface. Questions? Please email our Customer Service Team at contactus@instabed.com or by phone Monday-Friday 9 AM - 5 PM CST at 1-800-325-4121