Designed for use with handled ascenders to allow user to climb back up rope. Manufactured of high quality 1" type 18 nylon (Strength: 6,000 lbf). One sling attaches to seat harness, the stirrup connects a second ascender to the right or left foot. Weight: 8 oz. / pair. 602300 Medium - Fits up to 6' height 602400 Large - Fits over 6' height