Channel your focus into pure relaxation for the pathway to perfect sleep with the Flexhaven 10 Inch Pressure-Relief King Memory Foam Mattress. Topped with a 3" layer of gel-infused memory foam to keep your body climate steady, this firm king mattress dissipates body heat while quickly conforming to your weight and position for ultimate comfort and support. Sleep restfully with an open-cell ventilated memory foam bed-in-a-box that relieves pressure points, reduces bounce between two sleepers, and delivers welcome relief from the aches and pains of traditional king mattresses. The Flexhaven Cooling Gel King Mattress is CertiPUR-US certified by accredited independent testing laboratories, so you can be confident that the memory foam is made without formaldehyde, ozone depleters, mercury, and other heavy metals including PBDEs, TDCPP or TCEP (”Tris”) flame retardants, and is low on VOC. This 10 inch king memory foam mattress comes vacuum-packed and rolled to fit into an easily portable box that ships directly to your doorstep. It takes 2 to 4 hours for the king gel mattress from your bed in a box to expand most of the way and a day to expand fully. This memory foam mattress includes a removable stretch knit diamond patterned cover. Use with a box spring or mattress foundation is optional. Slatted bases should be less than 3" apart. Set Includes: One - Flexhaven 10" King Memory mattress