Not very comfortable
- Familiarity: I've used it once or twice and have initial impressions
- Fit: True to size
- Size Bought: Medium
The vented linking under the armpits and on the arms sounded good in theory, but I found the additional seams to make this possible very itchy and uncomfortable. Icebreaker has a good reputation, and I was looking forward to getting this, but I just found it far more uncomfortable than many other merino base layers out there.