Hi. That's used for simul climbing, so if the second falls, he won't pull the leader down. Probably I should have used two actually, because there's two ropes.

You should not extend it, it will follow the rope up when you climb. If your follower falls you will get his weight on you and potetially get pulled off. Which is what the micro is there to prevent. Same goes for ropestretch when you climb with doubles. Simuel is fun and safe when done right, this is not it😅 Brent Berghahn has a greate article on the subject.

Thanks for the piece of advice!

@@mkclimbingkeep crushing👍