
Comfortable, true to size. Windproofing is incredible. Makes a thermal jersey comfortable in temperatures 10 degrees colder. High quality construction. Can't speak for durability yet.
The reason to buy this is the windproofing--if you normally wear a windproof gillet, this won't do any more for you than a regular thermal undershirt.
Downsides: price (over $100 for fully synthetic--I would have expected merino for the non-windproof portions at this price point), care (wash inside out, remove immediately, line dry only), tag (large and scratchy and hard to remove). Still a five star base layer, just not "perfect".
I have used Craft base layers and other Craft products for many years. I keep coming back for the mechanical knit. This makes the base layers tight to the skin for greater moisture wicking but are extremely flexible. I feel warm and do not feel squeezed in anyway.
The wind stopper panel is perfect on a descent. After a long sweaty cold weather climb, I can keep from freezing on the down hill without changing into a jacket.
I do cross continent touring so I use layering to adjust to any climate. This item is a versatile light weight addition to my wardrobe.
I have assorted garments from Craft for different conditions, the baselayers are my go to, the Swedes know how to design cold weather clothing for all types of activities.