This vest is actually feather light and provides amazing warmth for its weight. It is perfect for a 10 degree drop from your comfort zone, particularly if you are being a little active. I have used it hiking, horseback riding, and in the office. It cuts the wind well and packs up really small. I haven't had the opportunity to try it in the drizzle or rain as I live in southern Arizona, but, the dust wipes off easily with a damp cloth even in very dry static filled weather. I was even able to wipe off some melted chocolate without laundering! Laundering definitely returns it to its original state though. The pockets are big enough to hold my iPhone 8 Plus and although it is a Trim Fit, it is not so tight that my phone is visible in the pocket. The pockets are at a perfect height above my backpack and hydration pack hipbelts. I found the vest to be true to size (I have the Atom SL Hooded Jacket, Atom LT Vest, Phasic Sun Hoody, and Yonge Wrap all in XS). I am 5'1", 110lbs, and wear a 36B bra. I have broad shoulders and significant lats and found the arm holes to be sized comfortably yet close to my body. The style is very clean and classic; better looking than on the Arc'teryx website in my opinion. I ordered Black Sapphire which is a beautiful navy blue.