You’re on a backcountry ski trip with five friends, presently a four-hour ski from the nearest road. The weather over the last 24 hours has been challenging with unanticipated daily highs of 9F (-12C) and nighttime lows of -20F (-28C). When you stopped to camp one of your companions revealed that he may have frostbite on his fingers. As a Wilderness First Responder (WFR) you asked if you could look at his hands. You were struck by how white they looked, especially the fingers on the right hand.