Fast & Light
As a trail runner and backpacker, I regularly fast pack in the mountains -- I look for compressibility and a solid warmth-to-weight ratio. The Kayu definitely offers that. The snug mummy fit is perfect for bare bones adventuring, especially in summer months on the trail. The included compression sack lets me cram the bag in the top of my UD fastpack along with a light pad and other essentials. Great bag!