First off, let me say that I just got this bag today...so this may need to be updated in the future. But, this pack is awesome. I am not reviewing it as a snow pack, but rather a small day pack...similar in size and toughness as the Black Diamond Bullet. I currently have the Bullet and love it. I've had it for a few years and it's super tough and functional...but there are only two compartments...not a lot of organization. I love that the bullet does not have back padding, as it conforms to your body and does not have any shape of it's own...it's also light and packable.
But I wanted something a little bit larger with more organization but just as tough as the Bullet. In comes the Silo 18. For me, this thing is just about perfect. It is tough, perfectly sized, and has a total of 4 pockets. The framesheet is not removable, but that's okay...there are obvious pluses to having one. Using it as a daypack, I do not need the ski holding strap system...so I cut them off....in fact I cut all the extra stuff off and even trimmed the extra length off the shoulder straps. Now this thing is a streamlined, perfectly-sized, water resistant daypack. I can not understand why this pack hasn't gotten more recognition as a daypack or otherwise...it is absolutely awesome. I did a ton of research before buying this pack and I really feel that it's one of the best options out there. And of course quality-wise it's all top notch...standard Arc'teryx. Feel free to ask any questions about the pack.