Never seen these before last lion season, while hiking down a frozen scree face my buddy stops and busts his out ....I'm clinging for dear life and he's skipping along no problem. Bust mine out yesterday for the first time, wish I'd remembered they were in my pack on the way up but I used them coming down and as titled GAME CHANGER. Do pay attention to walking with your feet fairly wide apart because they will rip holes in your pants if you rub them. Also make sure to use the orange keepers to keep them from falling off!