Casper Cooling Select 12-inch Hybrid Mattress review

A separate Costco hybrid, not the foam Cooling Select

The Costco page names a Casper Cooling Select 12-inch Hybrid Medium Firm Mattress. That is a distinct mattress from the Costco Cooling Select 12-inch Memory Foam model. Its exact listing describes four foam layers—breathable open-cell foam, high-density memory foam, zoned transition foam, and durable support foam—plus resilient coils and a hand-sewn cooling cover. The source does not say how thick the layers are, how many coils it uses, or what coil system it contains. “Hybrid” is the retailer's construction classification; do not infer a particular coil type or copy specs from Casper Dream, Snow, or another hybrid.

Casper's current Costco-customized maker page describes a four-layer foam Cooling Select but does not identify this separate hybrid version. That difference matters: the hybrid's materials and size selector here are supported by the exact Costco page only. The maker page's all-foam description, maker-listed sizes, weight table, or exclusivity language is not transferred to the hybrid. This review keeps the two products separate even though they share the Cooling Select name.

The comfort label is unresolved on the retailer page itself

The product title says Medium Firm, while the same page's specification table says Medium. Those are both retailer labels on one source page; no Casper hybrid-specific manufacturer page or numeric firmness scale was found to reconcile them. To avoid presenting an either/or conflict as certainty, the matching record does not assign this hybrid to Medium or Medium Firm. If a particular feel is essential, verify the live listing and seller explanation, and if possible assess the exact mattress in person. Other Casper models' comfort words are not a substitute.

The same restraint applies to sleep-position and body-size advice. The inspected page does not give a product-specific position recommendation, body-weight capacity, or named adjustable-base approval. A layer described as zoned transition foam is not equivalent to guidance for a particular sleeper, and a warranty requirement for a firm, structurally capable base does not certify every adjustable frame. If you need one of those conditions for a safe or compatible setup, ask Casper or Costco about this exact item number before treating it as a fit.

Four retailer sizes, one 12-inch profile

The exact Costco selector shows Full (Item 1800512), Queen (1788193), King (1788194), and Cal King (1788195). Twin, Twin XL, Split King, and Split California King do not appear in that selector. All four listed sizes are shown at 12 inches high. Costco also supplies dimensions and shipping weights by size: Full 53 × 75 inches and 75 pounds; Queen 60 × 80 inches and 91 pounds; King 76 × 80 inches and 113 pounds; California King 72 × 84 inches and 113 pounds. Those are retailer specifications, not measurements made for this review. Check the exact size and item number in the live page, especially if hallway access, frame dimensions, or lifting is a concern.

Against the all-foam Cooling Select, the only firm comparison we can make from these exact pages is construction: this item includes coils as well as foam, while the other exact Costco item is listed as memory foam. Both are 12-inch profiles and both pages use cooling language, but that does not prove a difference in temperature, movement, edge support, or durability. The Foam page labels its specification Medium without a title conflict; the Hybrid page does not resolve its own label. The models also have separate variant codes, so a shared name or similar photo is not a reason to treat them as the same product.

Returns, warranty, and delivery require a seller check

Costco describes doorstep delivery without setup or packaging removal. It says setup and haul-away are available for an additional fee quoted at checkout, with service-area exceptions. Its page states that Costco.com products can be returned at Costco warehouses, but also points to exceptions and limitations. It does not give this hybrid an exact trial-night count, return deadline, or fixed pickup fee. Casper's direct online mattress-trial policy is not assumed to govern a Costco purchase.

Casper's current limited mattress warranty states a 10-year term for qualifying mattresses purchased from Casper or authorized retailers. The warranty also requires an original purchaser and proof of purchase, requires an adequate support base, and excludes comfort preference and other conditions. The Costco listing links to manufacturer warranty information, but a page link does not replace checking that the exact new item, retailer, setup, and receipt meet the warranty. Retain the order record and review the current policy before buying.

What this source-based assessment can support

A shopper can put the hybrid on a comparison list when a 12-inch foam-and-coil design and one of these four Costco-listed sizes are priorities. Its cooling-cover language, durable-foam description, and resilient coils are useful prompts for questions, not proof of measured cooling or comfort. The item may not be the right choice if you need a settled Medium or Medium Firm label, a specific sleep-position recommendation, a documented weight limit, a particular adjustable-base pairing, or a numerical Costco trial/fee ceiling: the exact sources do not establish those criteria.

The Costco product page asks shoppers to enter a delivery ZIP code, so this review makes no stock or service-area promise. Its captured item details are a dated source check, not a report of current price, availability, ratings, or customer experience. No one on this site claims to own, sleep on, measure, or test the mattress. For the underlying decisions, see our guides to foam-versus-coil construction, firmness labels, and trial and return terms.