I've used this a few times a year since I bought it, but I'm selling it to declutter. Below is the manufacturer's product description: ITEM INFORMATION The main body fabric uses "GAIFU®," an ultra-high-strength nylon woven fabric born from Toray's advanced technology. Unlike conventional 66 nylon, it is a woven fabric using the world's highest-level high-strength nylon yarn, thanks to high-viscosity polymer spinning technology and spinning technology. Furthermore, it uses a material that is more robust and durable than 66 nylon, incorporating purely domestic technology. This GAIFU® 420d nylon is coated with a durable water-repellent finish on the surface and three different layers of coating on the back, making it lightweight and highly waterproof. The attached fabric uses INVISTA's 1680d CORDURA Ballistic® nylon, which has about 5 times the abrasion, tear strength, and durability of regular nylon, and is further enhanced in strength and waterproofness by applying PVC processing to the back. The attached leather uses eco-nume cow leather tanned with vegetable tannins, without using any harmful substances or hexavalent chromium, and has passed the Japan Leather Technology Association's 13-standard harmful substance test (JES). The front pocket zippers use YKK's EXCELLA, which has been carefully polished on each element, and parts are kept to a minimum of metal to reduce weight. The triangular name tag has a retroreflective function and considers safety at night. It has a space to store laptops and tablets. It is a series that suits various situations, both on and off, with a simple design and color. Size W355 H365 D140mm Weight Approx. 660g Material Toray GAIFU® 420d nylon (water-repellent coating) / CORDURA Ballistic® fabric 1680d nylon (PVC backing) / JES certified eco-nume leather Color: Navy系 (Navy-based) Material: Nylon Features: Vertical Accessories: None Stains/Tears: None