After reviewing all the available 'mattress in a box' brands information on the internet, we were most interested in trying the Tuft & Needle 'Mint' Hybrid mattress which is assembled in 6 layers. This includes 2 separate layers of springs and micro diamonds infusion in the top foam layer for good cooling effect. We found that National Mattress had this on display in their warehouse for testing purposes, and National Mattress was also having a super special savings price on this mattress. As soon as I tested it, I was 'sold' on its comfort. National Mattress indicated these were 'flying off the self', and I am now a happy buyer too. I highly recommend testing the different display models and buying at National Mattress, your 'one stop' place for mattresses. - Vello V.