A WONDERFUL company and mattress. We bought our latex mattress about 7 years ago and have slept well ever since. For a mattress they let you choose three, 3 inch layers of latex to suit your needs. My husband got extra firm, firm, and medium. On my side of the bed I got firm, medium, and soft. There has been no dipping or sagging of any kind. The mattress really has held up perfectly over the years. This will be the only bed we ever buy. I highly recommend it!