Intex Classic Downy Airbed, Full Location, temperature, and humidity will affect the airbeds firmness. Airbeds will need to be occasionally re-inflated (topped off) to maintain desired firmness when used for more than a few days as vinyl tends to relax over time Measurements will vary based on customers inflation. Airbeds are measured from the widest point including the beams (bulges) on the side and off the tallest point from the floor including built-in pillows if applicable Full-size inflatable mattress with 20.8-gauge waterproof flocked top Flocked surface is soft, comfortable, and prevents bedding from sliding off Sturdy construction with 14-gauge vinyl beams and 15-gauge bottom 2-in-1 valve with extra-wide openings Raised 8.75 inches off the floor; supports up to 600 pounds