Serta ThermaGel Cooling Pressure-Relieving Memory Foam 2" Mattress Topper (Queen) $22 at Walmart $22 $74 Walmart has the Serta ThermaGel Cooling Pressure-Relieving Memory Foam 2" Mattress Topper (Queen, Blue) on clearance for $22 with free shipping with Walmart+ (30-day trial) or on $35+. King-size is $29. $22 retail: $74 Price History See Price History Report Posted by Faraday04/27/2024 at 05:19 PM PT