We are working on Eli’s room remodel that includes built in bunk beds. I was shopping for an organic mattress that was non-toxic and when I found naturepedics kids 2 in 1 mattress my search was over. The best part is one side is waterproof and the waterproof part is non toxic and made from sugarcane. When they are done potty training just flip the mattress over to the quilted side. I’m in love. LTKhome