Nice soft shell jacket that I use as my everyday jacket in and around NYC. I usually wear a short sleeve polo shirt, a thin fleece, and this jacket and am fine in temperatures down to 30 degrees or less. This is a soft shell jacket with minimal insulation so others who have complained about requiring layers with this jacket, keep in mind, that is the point of this jacket. it's a soft "shell". The windproof works great, I don't feel any wind flowing through the jacket and it can get quite windy where i live. Also, i'm 6 ft 185 lbs with a muscular build and the large fits me perfectly. The cut of the jacket is a little boxier and not as "athletic" as other acteryx jackets (i also have the Alpha SV), however, the additional room is nice to be able to throw additional layers underneath including a thick fleece. All in all, the fit is still nice. Once last thing is that this particular jacket is made in China and not Canada, however the craftsmanship still looks top notch but only time will tell.......

I got the red beryl in tall (i' 6 ft. tall, 185 lbs.) and the fit is great. If unsure between regular and tall, i suggest you go to the Arc'teyx site and click on the Service link in the bottom menu and look at the pack fit guide as well as sizing guide links. I have yet to take this pack out into the mountains, however the quality of the pack is the quality that one would expect from arcteryx....top notch. my only complain is that the color is not really "red" beryl, but more like "orange" beryl. They should have made it a true red color. I chose this color because my outfit is usually all black and wanted something brighter and easier to spot on me when in the mountain or backcountry. Also, keep in mind that the bottom of the pack is a bit narrower than the top, but i actually like that because it conforms to my back nicely and i don't feel that the sides are too wide. If considering between the silo 30 and 40, besides obvious size and capacity differences, keep in mind that the silo 40 is top loading whereas the silo 30 is panel loading (zips down the sides).