We thought we would let you know that we have gotten more used to the firmness of the mattress and don’t think we will be exchanging anything. Thank you again for all of your wonderful customer support and willingness to keep following up. If in a few years we desire change, then we could just purchase a 3″ medium pad then and swap it out. It feels so good to know we are not breathing mold every night. I hope your business thrives! – D. N.