ok I am pretty new to BP but I was watching some jim shockey video's when they are hunting in canada, (whitch I hunt alot cause I live there lol) and they most of the time have like a hat or mit thing over there scope and rifle even when they are shooting, what is this for does it serve some purpose, I know its not some proto type thing cause in most cases you can tell its just a cut hat lol..it must serve some purpose??clare?blow back??the cold temps??any ideas