The Mainstays (Walmart) 12 Inch Memory Foam is part of the Mattress
test program at Consumer Reports. In our lab tests, Mattress
models like the 12 Inch Memory Foam are rated on multiple criteria, such as those listed below.
Petite side sleeper: Sleepers small in both height and weight.
Average side sleeper: An average of both the petite and large scores that applies to many people.
Large/Tall side sleeper: Side sleepers who are above 6 ft 2 inches tall and/or 220 pounds.
Adjustable frameAdjustable bed frames will allow the head and foot sections to be raised and lowered independently. Note: Some manufacturer's beds will only be compatible with their own adjustable bed frames.
Mattress-in-a-boxThe mattress will be delivered to your door compressed and rolled into a box to make it more manageable. Some boxes will be approximately 42 inches tall, 20 inches wide and 20 inches deep and can weigh between 60 and 120 pounds.
Where to buy
Where to buyThe location where we purchased our tested sample. For additional locations, check the individual model's ratings page.
TypeIndicates the main composition of the mattress, such as innerspring or memory foam. Some so-called "hybrid" innersprings include one or more levels of foam on top.
Dimensions LxWxHThe mattress's dimensions, length by width by height, in inches.
80 x 60 x 12
Latex foamAn alternative to memory foam.
Gel-infused foamA layer of foam infused with gel, which is claimed to make you feel cooler in bed, especially with memory foam.
Resists bouncinessIndicates whether the mattress can absorb impacts, minimizing the bouncy feeling you might encounter while changing sleep position.
Eases movementIndicates whether the mattress has enough resilience to allow easy changes in sleep position.
GripsHelpful when handling the mattress.
Retains warmthSome mattresses are more insulating than others and trap body heat, making you feel warmer.