Bouldering
Bouldering is a form of rock climbing that is performed without the use of ropes or harnesses. While it can be done without any equipment whatsoever, most climbers use climbing shoes to help secure footholds, chalk to keep their hands dry, and bouldering mats to prevent injuries from falls. Bouldering problems are usually less than 6 meters (20 ft.) tall. Artificial climbing walls allow boulderers to train indoors in areas without natural boulders and more padding.