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The Member's Mark Premier Collection 12 is a 12-inch memory foam mattress in a box, sold in Ultra Plush, Medium and Firm versions. The Medium is the middle option: a four-layer foam build with a cool-to-touch quilted cover and a half inch of foam in the cover for a softer first feel. It is CertiPUR-US certified, fiberglass-free and rated for 300 lb per side, and it works on adjustable bases, platform beds and box springs. Against big-name memory foam brands it competes on a thicker profile and a quilted cover at a warehouse-club value, but it has no zoned support or coils and only a limited warranty, so heavier sleepers and hot sleepers should weigh it against hybrid rivals.
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Lowest price we've seen: $499.98 on Nov 9 at Sam's Club. Tracked across 1 store since Nov 9.
Owner feedback on the Premier Collection line is generally positive on comfort and value, with the Medium drawing praise for its balance of cushioning and support. Complaints center on heat retention, soft edges and the first few nights of foam smell.
| Size | Width | Length | Height |
|---|---|---|---|
| Twin | 38" | 75" | 12" |
| Twin XL | 38" | 80" | 12" |
| Full | 54" | 75" | 12" |
| Queen | 60" | 80" | 12" |
| King | 76" | 80" | 12" |
| California King | 72" | 84" | 12" |
This is a 12-inch memory foam mattress in the California King size, with a Medium comfort level. It has a four-layer foam design intended to provide cooling comfort, pressure relief and consistent support in any sleeping position.
The mattress has a cool-to-touch quilted cover that contains 0.5 inch of foam. Inside are gel memory foam, air channel foam and a 5.5-inch premium base foam. The foam is CertiPUR-US certified, made in the USA, and free of heavy metals, phthalates and ozone depleters. The fire barrier is fiberglass-free.
It ships as a mattress-in-a-box: unpack it, unroll it and let it unwind. It works with adjustable bases, platform beds and box springs, and each side supports up to 300 lb.
