Buckshot , a light just went off on the meds thing you said. This year I've been on some pretty nasty stuff, legal, and for the first time could not keep warm. I've bowhunted many times in -20* and wasn't this cold and it was only 30-40*. I see the doc on Dec 3rd and will raise this with him. I still use polypro and wool as it has worked for many years. Just something has changed this year?????