Free Soloing is a form of climbing that’s done without any sort of protection - no ropes, no harnesses, no climbing gear. Nothing but a good pair of climbing shoes, chalk to keep your hands dry and your technique and wits. It’s been around for decades but came back into the spotlight in the excellent documentary, Free Solo, which profiled Aex Honnold and his free ascent of El Capitan in Yosemite, a truly spectacular and breathtaking achievement.