What you got there is an inclement weather call, impervious to rain, sleet and snow.
Being aluminum, I have to wonder if that call would tend to freeze-up quicker. I would guess yes.
A couple of times during this past fall's waterfowl season, it was cold enough that my plastic duck call and acrylic goose call would freeze and I had to keep putting them inside my jacket to thaw.
Freeze up,,,,,,????? We've had skeeters all winter
Quit your braggin' Chip! LOL! I would love to fight mosquitos right now instead of being cold. Dad and I had a propane heater going in the blind the other day. I made the excuse that it was to keep Dad comfortable, but I had my hands over it quite a bit.