Particularly lightweight mid-layer for sweaty activities. The fabric is mostly recycled polyester with some elastane, which makes the jacket breathable and moisture-wicking.
The Lyngen Alpha90 Raw Jacket M from Norrøna does well in the middle. The jacket is made of Polartec fabric, mostly recycled polyester and is fast drying, moisture-wicking and breathable. If you ever wear only the jacket, you have at least one chest pocket available. Otherwise, the jacket brings a high collar and elastic cuffs with thumb loops.