Casper Cooling Select 12-inch Memory Foam Mattress review

The exact offer is a retailer-specific 12-inch foam model

The Costco page calls this the Casper Cooling Select 12-inch Memory Foam Mattress and labels its composition Memory Foam. Its feature list describes a cooling knit cover, a breathable top layer, pressure-relieving memory foam, Zoned Support, and a durable foam base. Casper's own Costco-customized page backs up the broad four-layer foam and zoned-support description. Those are source descriptions, not findings from opening the mattress or testing its temperature, pressure relief, or durability. The maker page calls the foam version exclusive to Costco; an Amazon search is not proof that the same model is offered there.

Costco's exact specification table labels the surface Medium. The Casper page does not supply a numerical firmness score or a shared firmness scale, so the retailer label is useful for identification but not a prediction that every sleeper will find the mattress medium. We did not find model-specific sleep-position advice, a body-weight limit, or an exact adjustable-base approval for this item. Zoned Support language does not establish any of those things. If a particular sleeper position, weight limit, or named base is essential, leave the finder choice open only if it is not essential; do not treat missing documentation as a match.

Read the size and item-number evidence narrowly

The current Costco selector capture exposes four size entries: Full (Item 1748799), Queen (1748800), King (1748801), and California King (1748802). Twin, Twin XL, Split King, and Split California King are not choices on that exact item page. Casper's broader Costco-customized page does show Twin and Twin XL in its size list. That is a real difference between two primary pages, not permission to infer that those sizes can be selected in the Costco offer we reviewed. Confirm the exact live size selector and its item number before ordering.

The 12-inch mattress profile is stated by both sources. Costco supplies Full, Queen, and King dimensions in its specification table; the captured table does not include a California King dimension, although Casper's maker page lists a Cal King profile. More importantly, the size weights conflict: Costco lists 56 pounds for Full, 68 for Queen, and 86 for King, while Casper's Costco-customized page lists 73, 85, and 104 pounds for those same names. We cannot tell from the pages whether the difference reflects a version, a different weight basis, or a data error. We therefore do not repeat one set as definitive or use it to judge whether a shopper can move the boxed mattress. Check the exact size's current product label and shipping details.

What the cooling and zoning language does—and does not—say

“Cooling” appears in the product name and the retailer describes a knit cover and breathable foam. That is a design claim, not a measured result or a guarantee that a particular room or sleeper will feel cool. The retailer also describes four foam layers and Zoned Support, but neither page gives layer thicknesses, foam densities, a numeric firmness test, or independent results for motion transfer, edge stability, heat retention, or lifespan. Treat those gaps as unknown rather than borrowing figures from the current Casper The One, Dream, or another mattress.

For a shopper comparing foam with springs, the useful distinction is structural: this listing is presented as a foam mattress, not a hybrid. That tells you what kind of construction to verify, but it does not prove a particular contouring feel, ease of movement, partner-motion result, or body-size capacity. If an independently measured performance outcome matters more than a documented construction difference, this source-based assessment cannot answer that question.

Delivery, returns, warranty, and the questions still open

Costco describes doorstep delivery without setup or package removal. It says setup is available for an additional fee quoted at checkout, with packaging removal and old-mattress haul-away included with that upgrade subject to stated service-area exceptions. The page says Costco.com products may be returned at Costco warehouses, but also points to exceptions and limitations. It does not state a fixed home-trial duration, pickup charge, or model-specific return deadline. Casper's direct online trial terms should not be silently transferred to a Costco order. Check the current Costco return policy for this exact item and your location before using “returnable” as a substitute for a no-cost trial.

Casper's current limited mattress warranty describes a 10-year term for qualifying mattresses purchased from Casper or an authorized retailer, with original-purchaser and proof-of-purchase requirements and conditions on the supporting base. The exact maker page sends shoppers to Costco, but a warranty remains conditional: retain the receipt and verify that the seller, new-product status, support surface, and claim process satisfy the terms. The exact Costco page itself does not identify a specific compatible adjustable frame, so ask the seller or maker about the intended setup rather than assuming every base qualifies.

Who might put it on a comparison list?

This model is worth comparing on paper if you want a 12-inch, all-foam construction, a retailer-labeled Medium option, and a Full-through-Cal-King selector at Costco. Its named support zones and cooling-cover language can help you identify what to ask about, but neither substitutes for a way to assess personal comfort. It is a poor match for a hard requirement that the current source set does not establish—such as a 100-night Costco trial, a maximum return fee, a model-specific stomach-sleeper recommendation, or an exact base pairing. The source page also asks for a delivery ZIP code, so this review does not assert stock or eligibility at any address.

This assessment is based on the named retailer and manufacturer pages. No one on this site claims to own, have slept on, measured, or tested this mattress. For more context, see the guides to mattress size and room fit, firmness labels and sleep-position language, and trial and return terms.