Walmart discounts the Spa Sensations 12" Gel Memory Foam Comfort Mattress with prices starting from $119.99 with free shipping, as listed below. It features a 2" top layer of Theratouch gel memory foam, a 3" comfort foam layer, and two base layers of high-density support foam. The sizes:
Twin for $119.99
Full for $159.99
Queen for $185
King for $219.99