These are comfortable to sleep in, but there were a couple of things that surprised me.  1) When I took them out of the packaging the drawstring was tied in a little bit of a bow.  After I put them on, one end of the drawstring disappeared into the waistband.  I had to use tweezers to get it back out.  There didn't seem to be a lot of slack in the drawstring.  2) They were incredibly long; much longer that I thought they would be.