Peter P.wrote a review of Arc'teryx Atom LT Hooded Insulated Jacket - Men's on April 16, 2019
Familiarity: I've used it several times
Fit: Runs small
One of my better outdoor gear purchases. Hood adds a lot of warm. Don't worry if I forgot my hat. Very lightweight and compressible,
I think over 45 degrees maybe too warm with exercise/moving.
I don't use any layering underneath, just a light synthetic shirt.
I am about 170 lbs and the large fits perfectly. medium would be too tight.