Like someone else said, more of a deep sleeper than a heavy sleeper. I have to have white noise to sleep - a fan or a white noise app. If the power goes off during the middle of the night and the fan turns off, I wake instantly. But I can sleep through my husband's alarm (but not mine). Also like a previous poster, I can go to sleep almost anywhere. I fall asleep on the couch most nights for at least an hour, get up and feed the cats, wash my face, brush my teeth, put on pajamas and can still be back asleep within a few minutes. If I'm sleepy in the afternoon, I can set a timer on my phone for 30-40 minutes, fall asleep and wake up refreshed when the timer goes off.