Alright here it goes! Everyone sit down before you read this and pay Attention!!!!
Thermals are best used when it's cold outside! Use the Polar Weight when it's REAL cold and a light weight when not so much. Oh and you should get the RED ones with the flap on the butt so when you stick that monster buck at 80 yards you won't Shizz yourself!
Hope this helps! :-)
So easy I can't help it B-)