Coleman Double-High SupportRest w/Pump 120V pump included for fast & simple inflation/deflation Double-high airbed is as tall as a regular mattress Soft plush top for luxurious comfort Airtight System with Double Lock Valve so your mattress stays inflated Comfortable Coil system for great support 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.