I don't normally go out of my way to write reviews but I am ecstatic about this pack. I bought this pack for technical scrambling/climbing and as a supplement the two osprey packs I already own. At this point, the Mutant has replaced both of the other two for all but the longest multi-day trips/ heaviest loads. The packs functionality is pretty remarkable. The support system is very minimalist, but works well. The steel bar that sits on the back rest is flexible, but stays in place after adjustment. The hip straps are a great feature and I have been able to fit an entire double cam rack onto the belt loops with some added ice hook carriers. The ability to tie back the larger parts of the belt and keep it as a single harness compatible strap is just bonkers. The lashing on the sides of this pack, the ice tool carrying system, and the helmet strap are also amazingly well designed. With all of the adjustability, I have managed to carry overnight snow camping gear, 3 days of food and glacier gear comfortably. I guarantee you could fit a climbing rack on top of that, although your shoulders might regret it. The main compartment's bladder system is pretty standard, and comparable to other osprey packs in that it works well. I will say that this pack has a problem in its ability to store water bottles in an accessible manner. Since climbers use bottles in colder conditions, I wondered why an ice climbing pack wouldn't have a way to keep those close at hand, BUT there are many ways around this problem. I tend to lash them to the sides and have a partner help pass me water. This is one of the only draw backs I have found on the pack so far. The only other thing that would make this pack more perfect would be main compartment waterproofing, or added rows of daisy chains to the pack face. The current webbing lash points are almost hidden, and require buyers to figure out on their own. This aside, it is by far the best pack of it's size on the market right now.
Tyler the climber gone postal
Washington Cascade Range