The Sleep Inc. 5" Low Profile Mattress Foundation provides a solid foundation for your Sleep Inc. mattress (sold separately). The shorter profile provides a lower height for sleeping surfaces and is recommended for thicker mattresses or a headboard/footboard with side rails. This foam mattress foundation comes in several sizes, including twin, full, queen and king. It also has coordinating fabric to match the mattress line. Simply slip it under your mattress, and you're ready to go. Sleep in comfort and peace with the right mattress and foundation to do the job.