These are about the same weight as a light pair of sweat pants and very cozy. Nice thick fabric. My only complaint is that the waist is quite low and way too big for me. If the waist was just a little higher you could get away with it being loose but not with something so low-cut -they fall down! I do have an athletic/muscular build and a smallish waist in relation to my hips/thighs but even so I would say these are disproportionally bigger than they need to be in the waist. I don't know if it is true in all the sizes but in my size (large) it was a problem. I was really sorry to return them because I loved the fabric.