These pants are NOT SWEATPANTS! Please do not advertise them as such. I bought these for my husband to wear in winter. I have searched and searched for sweatpants, TRUE SWEATPANTS, with a fly opening or zipper. I couldn't find ANY, except for these. I was expecting a heavy fabric, but these are made of a thin, flimsy, silky fabric that I can't imagine he will get any use out of whatsoever. The zipper opening is great: please use heavyweight actual sweatpants material to make the pants.