Great mornings and focused, energetic days begin and end with restorative sleep and a great mattress makes all the difference. Lay yourself down on the soft knitted fabric covering of this king size bed mattress filled with premium foam with cooling and pocket spring coils that provide the firmness you need, with the softness you crave. This hybrid mattress is constructed with ultra-supportive material that cradles your body in every position, keeping your back, neck and shoulders comfortable to provide the restful sleep you and your family need. The foam is CertiPUR-US Certified so it's free from heavy metals, phthalates, BPDE, formaldehyde and has reduced VOCs so you can rest easy knowing your indoor air quality won't be compromised.This king-size hybrid pocket spring mattress is compatible with slatted beds, platform beds, metal grids, and adjustable bed frames. When using with a standard bed frame a box spring or other foundation is required. This versatile mattress is ideal as a guest room or RV mattress or keep it rolled in a closet for living room floor sleepovers. Arriving compressed and packaged for your convenience, this size bed in a box is easy to move wherever you need it. Perfect for your first house or apartment, this size bed mattress achieves the ideal blend of comfort, support and durability.