This mattress is my new partner.  I’m over the moon.  The top layer envelopes my body and embraces me.  And, I can tell there is a firm dense underbody holding me up. I originally was shopping for a FirmUltra Firm mattress however, this medium firm hybrid is dense enough under its embrace of me.  The 1st night was healing, the second night, I’d tried something I hadn’t since my adolescent years - I slept on my tummy without a pillow.  I did that purposely to stretch out the kinks in my neck, using the left  right corners to stretch out.  Deliberately switching face sides to stretch the neck muscles.  I am so grateful for this collaboration.  A Great Investment.  I owed it to myself because I’ve been working so hard and needed to heal.  Treat Yourself!