Mattress layers include: 2" memory foam, 2" super soft foam with pressure relief system and 4" high density foam base * Our patented pressure relief system virtually eliminates all pressure points to ensure a comfortable nights sleep * CertiPUR-US Certified; Scent Evergreen AND Active Charcoal is the extract from green tea and charcoal that naturally neutralizes odors from day one * No assembly required- remove from box, unfold, and lay your mattress on top * Bi-fold box spring simply unfolds and you lay your mattress on top; The steel frame provides maximum edge firmness