First impression
The small backpack comes in inconspicuous black, with some color accents that catch the eye. The tarpaulin-like, waterproof and very robust AC² material is familiar to me from the Arrakis models, which are unfortunately no longer in production, and is simply great (and yes, it is waterproof and really does last forever).
A closer look at the airbag system quickly reveals that a lot of thought has been put into it. Everything is optimally stowed away and the system hardly takes up any space in the backpack, which is not a matter of course for airbag backpacks. The flat battery is solidly stowed on the back panel and thus ensures a favorable center of gravity, the airbag and the Venturi unit for inflating it are surprisingly space-saving. The release handle, which at first glance seems a little strange, proves to be very practical and easy to grip. The leg loop is also an ingenious solution; it is simply clipped to the right-hand part of the hip belt using a small carabiner, which eliminates annoying threading and also allows the backpack to be put on and taken off without having to open and close the leg loop.
Once the battery is charged and the airbag system is armed (switch on the battery and handle set to "On"), the airbag is easy to deploy with a firm pull on the handle and inflates really quickly with a deafening noise. The airbag surrounds the head from the sides, which restricts the field of vision slightly, but also offers the head some protection.
In general, the backpack has a rather minimalist design. The storage space is accessible via a somewhat short zipper and is just enough for the essentials. When I attached my jacket to the outside on the ascent, the backpack was enough for day trips. In addition to the compartment for safety equipment, which is located inside the backpack, there is a small inner pocket for valuables and two straps on the outside for attaching whatever no longer fits in the backpack.
Tester and test conditions
I ski a lot and also go on many ski tours, but so far I have mostly been out and about without an airbag backpack. Not because I think it's a bad idea or shy away from the extra weight, but simply because the majority of airbags are unfortunately installed in backpacks that are not very suitable (in my opinion). I was able to test the Arc'teryx Voltair 20 extensively to find out that this is not the case and one thing up front: I would be reluctant to give the backpack back. I have been using it since mid-February 2017 and have tested it on numerous days in the ski resort and on ski tours. It was actually used in all the conditions you can imagine in a ski season. Only for long ski tours where glacier equipment is necessary was the small Voltair too small for me.