RMI and Whittaker Mountaineering Gear Guides Mount McKinley Expedition | Page 17

Overboots Expedition overboots add significant warmth, especially at high altitude. All-in-one mountaineering boots do not need the added insulation of overboots. Booties Goose down or synthetic fill. Booties can be worn inside of the overboots while walking around camp, which allows an opportunity to dry out inner boots.