I have a mattress that was custom built for my Casita, but we no longer have the Casita. We love this mattress, and it fits perfectly in a Spirit, Heritage, Freedom, or Liberty. I would love to keep it for our next Casita, but we have no where to store it and a new baby that will keep us off the road for a while. I 100% expect to own a Casita again in the future, but for now, time to say goodbye to our beloved mattress.