The 2000 Model is a 6"mattress, it has 3 layers of foam which combine into a comfortable bed that isn't too firm or too soft.
Top: 1" memory foam (3lb dense)
Middle: 2" Convolute (2lb dense)
Bottom: 3" Support foam (2lb dense)
2000 S Series
Flip and rotate your foam often to ensure even wear. Rotate no flip mattresses head to foot every two months.