The pack is basic and designed for emergency gear only, its thin and small the way I think they should be for mountain snowmobiling.
its so thin I dont catch on branches when boodocking, and its is hardley noticeable, at the end of the day I do have a slight digging sensation near my right armpit that I can't adjust away but I'm built a little wierd my right leg is about an inch longer than my left so my back bends wierd to accomodate that.
I carry, shovel, probe, (all inside nothing outside) extra goggles, matches, lighter, fire fuel goo, extra mid layer and I still have room for shedding my inner layer (I wear base, inner, mid, shell) and 1 pair of gloves. I still have some room without stretching the limits of the pack.
I ride with the older version of this pack looks the same design just new materials/colors.
I paid $20 for mine at an outlet store, the normal price was $120. I couldn't believe my luck finding the exact pack that I was going to buy, being blown out at an army surplus outlet - good day!
I've routinely used this pack 25-35 trips a year for the past 9-10 years. I did have to do a little patching on the bottom as the edge of my shovel handle eventually wore a hole in the bottom. No complaints would buy it again! and highly recommend it. I still wear this pack after purchasing a Klim pack designed for sledding (that fits odd and is a terrible design. and an SOS pack very nice but too large and baggy when not full and had a "clip on " bag with it that I didnt like for sledding.
if your interested I have the new Klim pack for sale
http://www.trailspace.com/gear/life-link/boundary-pack/
spomey