Definitely size up..
- Familiarity: I've used it once or twice and have initial impressions
- Fit: Runs small
- Size Bought: Large
I was eye balling this jacket for a while so when it went on sale I had to buy it! I bought it primarily to wear mountain biking on cool days to block the wind. I was concerned about the sizing since some reviews said to size up. I normally wear a Medium, but decided to size up. I'm so glad I did. The Large fit perfectly. It did however snug up a bit across my upper back when I crossed my arms in front of my chest, but the jacket has a bit of stretch to it so it wasn't a big deal. The arm length was also perfect. Love the Medieval Blue Current pattern with Teal Backcountry logo! Very happy with this jacket.