my biggest beef with this piece is its lack of durability. only one season old and this top has developed holes. I take extreme care of my gear and yet this one didnt hold up to moderate use. I think it may have to do with the wool content. I have found that my other merino pcs that contain a higher synthetic to wool ratio tend to hold up better. some may argue that you loose anti funk abilities and I would agree, but this is a cold weather piece and I often camp alone. I'll take longevity over stink ability 6 days a week.
I also found this piece to be the itchiest top I own. two other IB items i've purchased have had similar wear and tear issues.