Layla Sleep Memory Foam King Mattress - Copper Infused Cooling System Free Pillow: Use code LAYLAPIL at checkout to receive a free pillow COPPER INFUSED MEMORY FOAM - This copper infused cooling system mattress provides cooler sleep and variable support great for all sleeping positions FLIPPABLE FIRMNESS - Flip for comfort. Layla is a medium soft on one side and firm on the other so you get two firmness levels in one mattress THERMOGEL INFUSED COVER - Provides excellent heat dispersion and a cooler night's sleep. Thermo Gel reacts to body temperature to keep your body from getting too warm while you sleep. No more jolting awake in the middle of the night when you get too hot. FOR ANY FOUNDATION - Works with solid platform and adjustable base, box spring or foundation, bunkie board on a box spring, or slatted base. You name it!