Features a breathable back panel and an interior zipper that allows you to double up or down the main body Although it has a simple design, it can be used for a wide range of occasions, from day hikes to daily use with a wide variety of equipment, such as a pole carrier and chest strap. The muted colors make it easy to use in the train or city when you go to the mountain, and the black shoulder harness does not interfere with your everyday outfits, so it is perfect for those who go to the mountains, as well as those who don't know that they continue to climb all the time.