8mm Tag Lines are the largest diameter Sterling offers for a personal tagline but is still lighter than carrying a second rope and it's static nature gives you a line to jug up if needed without destroying your dynamic rope.
“Tag line”, “pull cord”, “rap line” – this versatile cord has been called just about everything. There are times when you only want to carry a single rope on a climb, but if the rappels are long, having a second rope makes a full length rappel possible. These small, lightweight cords are offered in three sizes to fit your need and experience level. Using tag lines is a technique for advanced climbers and takes proper training on how to safely use them.
Tag lines are not to be used for lead climbing. Tag lines should never be used in place of a dynamic rope, and caution should always be taken when rappelling with two different diameter ropes.