First - I can confirm that these are not your traditional flannel pajamas; they are definitely thinner.  But I was concerned about the thickness of the material so I decided to try a pair and I'm sending them back immediately!  These have to be the TIGHTEST pair of pajamas that I have ever tried on...  I even double-checked the size to make sure that they didn't send the wrong size!  They're fine around the waist; it's the legs/rear area that's the problem!

If you're looking for comfortable lounge pants, keep looking!