Backpack using DSM Dyneema composite fabric (Cuben fiber). Dyneema composite fabric in which Dyneema fibers are laminated with UV resin is used for high-performance sails for racing boats. Super lightweight material with high waterproofness and tear strength. This backpack is made with priority on lightness, so if a force concentrated on one point, there is a risk of damage such as a hole being made. Accessible inside with a zipper next to the front pocket and take out your luggage.