The 2024 Casper Cooling Select 12" Mattress from Costco is an exclusive, 12-inch, four-layer memory foam bed designed for a medium-firm feel, ideal for back/stomach sleepers seeking a budget-friendly option with minimal sinkage. Key features include a cool-to-the-touch cover, zoned support for spinal alignment, and a dense, "floating" rather than "hugging" feel. King size box springs included for free