If you went mountaineering in the Swiss Alps, what would you take with you? Probably well-insulated winter wear and a backpack full of gear.

How modern. Some of the climbers in these photos from the 1910s and ‘20s didn’t even wear hats while scaling cliffs.

Travel back in time to the days before neon parkas with these photos of adventurers who don’t button their coats all the way up. (Note: National Geographic doesn’t necessarily endorse the behavior in these photos.)