CORDURA 305d fabric made of special polyester yarn / has strength against friction, tearing, fraying, etc.

L-VENT processing (3 layers) on the back / ``Permeable to water vapor but not to rain and wind'' It is a breathable and waterproof material with a water pressure resistance of over 20,000mm. Seam taping on front pockets and side zip pockets / Prevents water droplets from entering through the seams Storage space for PCs etc. on the back layer (inside the bag) / Uses brushed material and thick cushioning material to firmly protect electronic devices. By inserting cushioning material into the shoulder pad (harness) and using stretch material on the back, the burden on the shoulders is reduced when using the product. *The main body material is made of waterproof fabric with 3-layer treatment, but it may get in through the seams in areas where seam tape has not been applied.