Ghostbed Supreme 12-inch Firm King Memory Foam Mattress pairs targeted zoned support with advanced cooling to deliver a firmer, supportive sleep surface. The Ghost Ice Cover provides twice the cooling power to dissipate heat, while gel memory foam and Ghost Bounce foam combine for contouring pressure relief that responds instead of sinking. ProCore™ zoned support offers 33% more reinforcement under the hips and lumbar to help maintain spinal alignment, and the mattress is made in the USA. Imagine waking refreshed and supported, even on warmer nights.