The Casper Select 12" Hybrid Medium-Firm Mattress combines advanced foam layers with pocketed coil support to deliver balanced comfort and durability. This queen-size mattress features a four-layer foam construction including breathable open-cell foam, high-density memory foam, zoned transition foam for targeted spinal alignment, and a durable support foam base. The hybrid design incorporates pocketed coils that reduce motion transfer while providing responsive support across all sleep positions.

The mattress measures 11.75 inches thick and weighs 91 pounds, with a firmness rating of 6/10 (medium-firm). Its construction includes 4.5 inches of comfort layers and 7.25 inches of support layers, creating a balanced sleeping surface with minimal sinkage. The zoned support layer provides denser support at the core for proper spinal alignment. The hand-sewn cover is made from 59% polyester, 40% polyethylene, and 1% spandex, offering a thin, breathable knit surface with cooling properties.

This mattress is CertiPUR-US certified, containing no ozone-depleting chemicals and is completely fiberglass-free. It ships compressed in a box for convenient delivery. The Casper Select excels in cooling performance, motion isolation, and response time, making it ideal for sleepers under 250 pounds across all positions. Costco backs this mattress with an exclusive 365-night trial period and a 10-year warranty, with free shipping and returns included.