Free solo climbing is a form of rock climbing where the climber climbs solo and without ropes or any form of protective equipment — they are allowed to use climbing shoes and climbing chalk. Free soloing is the most dangerous form of climbing, and, unlike bouldering, free soloists climb above safe heights, where a fall can be fatal. Though many climbers have free soloed routes with technical grades that they are very comfortable on, only a tiny group free solo regularly, and at technical grades closer to the limit of their abilities.