Are you looking for a comfortable and affordable mattress to help you enjoy quality sleep? Consider trying the Bestier black 12-Inch wool gel memory foam cal king mattress in a box, featuring medium firmness and high-quality construction, providing excellent support without sagging and effectively alleviate back pain. The support layer of the entire mattress is composed of high-resilience foam, memory foam, and a wool layer. The extra-thick memory foam cushioning layer, wrapped in the wool layer, making the mattress softer and allowing you to enjoy a more comfortable sleep. If you have any issues after receiving the mattress, please contact us directly.