The Kong Aeron Flex is an innovative and revolutionary harness for sport climbing, ski-mountaineering, trad climbing and multi-pitch routes. The Aeron Flex takes harness technology up a gear due to its flex system, making it totally customisable. Thanks to the 30 small positioning slots on the top and bottom edge of this harness, you can not only change the leg loops for a personalised fit, but additional harness features, such as a phone holder, can even be added. This creates the kind of harness that is perfect for you and your climbing or alpine needs. All this, and the harness weighs in at a mere 300g.