So the label for Ulcergard says: "Store at 68ºF - 77ºF (20ºC - 25ºC). Excursions between 59ºF - 86ºF (15ºC - 30ºC) are permitted."

Does anyone have knowledge of how effective it may or may not be if it has "excursions" in places that actually have a 'real' winter? i.e. Places that live between 30 and 30 below, 4+ months out of the year.