This is a business bag from Ace Gene. * Proflex series * Model number: 67604 * 2-way briefcase * Compatible with 14-inch PC * Expandable type Please check the Ace official website for other specifications. https://store.ace.jp/shop/g/g67604-01 I bought it new on Amazon last October. Since then, I think I've carried it for a total of about 60 days. No malfunctions. Comes with a shoulder belt. I haven't used it too heavily, so I think it's relatively clean, but I would appreciate it if you could judge from the photos. I really liked it because it's lightweight and highly functional, but I no longer need it due to changes in my work environment. I will brush off dust and debris and wipe it with alcohol before sending it. Non-smoking environment.