Sleeping structure

A multi-position sleeping structure includes a sheet material envelope having an opening into a cavity defined therein. An inflatable mattress is received and substantially enclosed within the cavity of the sheet material envelope. A cover portion which, in conjunction with a top surface of the envelope, defines a sleeping area in which a person can lie and be supported by the mattress. The mattress has a plurality of transversely extending hinges that separate the mattress into a first portion, a second portion, and a third portion. The hinges allow the mattress to be moved between at least a substantially flat sleeping position and a seating position. The sheet material envelope has a retaining pouch on a bottom side thereof that is positioned to receive the first portion of the mattress when in the seating position so as to retain the mattress in the seating position.