12" thick with dual memory foam layers that create deep down support and comfort * Open-cell technology keeps the mattress cool, creates a more durable foam, and prevents lasting body impressions * Correctly aligns the spine and helps relieve pain by supporting the natural curves of your head, neck, and shoulders * Conveniently shipped to create a portable mattress for easy set up * Foam is CertiPUR-US® certified, 25-year warranty