In reply to UKC/UKH Gear:
I've used mine (25litre) on multipitch up to VS on numerous occasions. Weighs mere grams yet can carry as much gear as a 35litre if you use the straps and expansion pockets and then shrinks to nothing on route. You can also configure it so that the waist belt sits high above the harness. Pockets on harness straps and waistbelt are really handy for camera or gloves en route. Probably not as robust as a Podsac or Alpine Aiguille but that's not the market it's aimed at. Will get another unless something even better comes along. Recommended.