Are you talking about for babies or adults? If babies, the purpose of the dual flip mattresses are for one side when they are infants (more firm) and then for when they are toddlers (less firm). At least the one we have. So, flipping every 3 months or a year defeats the purpose. We haven't flipped yet and won't until we put up the toddler bed.
Re: If you have a dual sided mattress when did you flip?
Every three months?! Wow. I've heard that flipping once a year was sufficient.
Lol Brandi! I should have been more clear (and omg, every 3 months? I think I've flipped mine like once!)
I Meant for the infant/toddler mattress. I was thinking about flipping Max's, but now I'm thinking maybe I should wait a bit? I don't know.?