Russian aider demo - Aideer Climbing 

Demo of using Russian style aiders. Video and demo by Aideer Climbing big wall gear, Sweden. Connect with Aideer: www.aideerclimbing.rocks or Instagram, @aideerclimbing.
Here's a brief explanation of how they work. You have two hooks attached with webbing straps to the inside of each leg, one by your ankle and one by your knee. The “ladder” is thin webbing with some metal rings sewn every foot or so. You step up by hooking with your legs into the metal rings. The main advantage to this is you can step a lot higher and be in better balance then you can in normal aid ladders.
Learn more here: Google "alpinesavvy Russian aiders"