Rock Technologies Dry 5 Friction is is an alcohol based liquid chalk solution which is applied to the hands in a liquid form. It inhibits sweating from the hands or feet, with no dust and little mess, drying your hands quickly and keeping them dry - enabling you to complete difficult bouldering problems without the need to re chalk during ascents. (It\'s also very useful for yoga or aerobics, where slipping on a mat because of sweaty hands can be a problem)