The Casper Cooling Select is a Costco-exclusive 12 inch memory foam mattress designed for all sleeping positions and body weights under 300 pounds. This medium-firm mattress features a four-layer foam construction including a breathable top layer, pressure-relieving memory foam, Zoned Support technology for proper spinal alignment, and a durable support foam base totaling 7.5 inches.

The mattress includes a thin knit cooling cover designed for breathability and all-night comfort. The premium foam layers consist of 1.5 inches of memory foam, another 1.5 inches of memory foam, 1.5 inches of poly foam for zoned support, and a 7.5 inch support foam base layer for durability and stability. Total comfort layer thickness is 4.5 inches.

Key performance features include excellent motion isolation, minimal sinkage depth of 1.91 inches, and good pressure relief across all sleeping positions. The mattress has a firmness rating of 6 out of 10, providing a medium-firm feel suitable for back, side, and stomach sleepers. The foam is CertiPUR-US certified, ensuring no ozone depleting chemicals, and the mattress is fiberglass-free for safety.

The mattress ships compressed in a conveniently compact box weighing 68 pounds and comes with a 365-night trial period, 10-year warranty, and free shipping and returns through Costco.