The 77designz 1*11 chain guide is so cool; it´s super light, mounted in no time and also quite affordable. It´s designed in Germany and tested during many Enduro and Downhill races in all over Europe. And of course is the freesolo also fine with 1*10 drives as long as you use an tensioned rear derailleur.
fits to: High Direct Mount
perfect for: XX1 or X01
weight: 31 gram (incl. mounting hardware)