I have poor sleep. I have severe apnea. I have a CPAP (actually, I believe it's a BiPAP) machine. It helps, but it doesn't really resolve the underlying problem. As far as what I sleep in -- diaper and whatever shirt I was wearing that day. Sometimes I do change out to a onesie when I diaper up in the evening, so it's that instead of the shirt. Like some others, I get way too hot. I sleep with a fan blowing on me. It's not helping that I got 3 or 4 giant plushies on the bed at any time now either. I will wake up repeatedly anywhere from as little as 30 minutes to maybe 2 hours. All night long, every night.