This custom RV Mattress Finishes out at 8 inches Our RV and custom mattresses are built with 3" of premium latex on top of 5" support base high density foam. Mattress is covered with our four way stretch organic cotton cover and we can configure each side for individual comfort. Choice of soft, medium, firm, or extra firm natural latex. The ultimate in luxury for your RV, with 15 year warranty. Please add $50 for custom sizes and configurations, such as curved and angled corners.