This is what I do.I put a sock over the head to keep in heat works great.I use ballons to seal the servos.Put your servos in ballon and cut a hole for the end and wire and tie it tight.If your rx is exposed do it aswell.Running in the snow is fun and your in the midwest like myself so we must drive in winter or they sit for months.Just use ballons on servos and rx and your good to go.