Sleep Master 6-Inch Smooth Top Therapeutic Memory Foam Mattress, Twin X-Large Price: $160.00 (as of 18/10/2017 12:39 PST- Details)

Mattress layers include: 1.5″ premium memory foam, 4.5″ high-density foam
Cover easily zips off and is machine washable
The mattress is shipped in a small box and can take up to 48 hours to fully expand from its compressed state