The mattress requires no time to air out and is ready to sleep on in 5 minutes once opened The pacbed original gel 11 memory foam mattress is designed to give you the classic memory foam feel at an affordable price The foam uses natural soy to replace polyols making it a greener product The open cell structure also allows the memory foam to rebound quicker so it quickly returns to shape after you change positions no more rolling out of a crater We use a specially designed open cell stru