Greetings past, present, and future thru-hikers. I am leaving Springer early February and expect frigid conditions. Can anyone recommend a lightweight waterproof overmitt to protect the digits from freezing rain and whatnot? I'll be wearing the Fox River Wool Glommit but feel like i may need some waterproofing if, rather when, the weather deteriorates. Was looking at some OR Rain Mitts (can't find supplier) and some Extremities (only from UK) but was hoping i could find a simple waterproof shell. Any suggestions?? Are these even necessary?