HAAS Ascent System
The HAAS features a fully integrated knee ascender that captures all of the advancement made by your other foot. It does this by allowing the bungee to run past the ascender all the way to the foot through a liner where it then pulls the lower tether and ascender up the line from the bottom when it is un-weighted. The result is a smooth efficient ergonomically correct ascent that uses major muscle groups evenly and drastically reduces fatigue and stress. If you ever thought it would be cool to use two foot ascenders here is your chance.
The HAAS is sold in regular and long lengths. When selecting size, you want the ascender to be halfway between your boot and your hitch.