This business series has a cool presence with red stitching and interior in consideration of the brand color. Sturdy cowhide leather handle with red tape inside. The main body material is Toray nylon GAIFU (Gaifu) woven with ultra-strong 66 nylon thread that is used in aircraft tire cords, etc. It has about 2 times the tear strength and tensile strength of about 1.6 times as compared to ordinary nylon fabrics. In addition, it is rated 5 for the highest level of water repellency, so you can rest assured even on sudden rainy days. YKK EYL zipper. Compared to regular zippers, it is about 1.5 times more wear-resistant and durable and unbreakable zippers. The lining of the shoulder straps is made with fabric that has an exlive, so it reduces wear and tear from your clothes even during the sweaty season, so it is recommended as a suit style.