Comfortable Coil system for great support Soft plush top for luxurious comfort Fits standard-size sheets Airtight System with Double Lock Valve so your mattress stays inflated Attached Wrap 'N' Roll storage system Inflated dimensions:73 in x 53 in x 8 in Location, temperature, and humidity will affect the firmness of the airbed. Airbeds will need to be occasionally re-inflated (topped off) to maintain desired firmness upon initial use and when used for more than a few days as material tends to relax over time.