The main body fabric is made from Toray's advanced technology and is made of ultra-strong nylon woven "Armor Cloth®". Unlike the traditional 66 nylon, the high viscosity polymer technology and spinning technology are woven using the world's highest strength nylon yarn. In addition, it is made from pure domestic technology that is stronger and more durable than 66 nylon. This Armor® 420D nylon has a durable super water repellent surface and a different triple layer coating on the back for a lighter and more waterproof feel. The included fabric is made from INVISTA 1680D CORDURA VALITEC® nylon, which is usually about 5 times more abrasion, tear strength, and durability than nylon, and the back is coated with PVC for added strength and water resistance. The included leather is made from econyme cow leather tanned with vegetable tannin without using any harmful substances (JES) that have been tested for 13 types of Japan Leather Technology Association standards. The zipper on the front pocket is made of YKK EXCELLA which has been carefully polished to the entire element, and the parts are extremely strong and lightweight by using no metals. The triangular name is retroreflective, so it is also safe at night. Spaces for your laptop, tablet, etc. The simple design and color of this series is suitable for a variety of situations, regardless of whether you are on or off.