Backpack Waterproof Business Backpack for Men 30L Large Capacity Anti-theft Laptop Bag 17-inch Laptop Compatible I bought this about 4 years ago on Amazon for around 6,500 yen and used it for commuting only one day. It was too big for me, and I've left it in the closet ever since. Therefore, it is almost unused. Please consider this item with the understanding that it is a product stored by an individual. The following is a quote from the Amazon site description: ▶【Reinforced stitching】The surface material uses high-density waterproof fabric that is resistant to scratches, achieving abrasion resistance and durability. Using YKK zippers, the stitching around the zipper is reinforced, making it even more durable than before. ▶【Unique features】Equipped with an external USB port, you can charge your phone while wearing it, making it convenient to carry. Emergency whistle and compass are added, applicable for emergencies, disaster prevention, outdoor activities, camping, etc. ▶【Breathability】The back and the back of the straps use mesh material on top of the cushioning material, reducing the burden on the shoulders and back while providing excellent breathability. Equipped with a chest belt, it is a safe design that fits the body better. The back part has a structure that can be set up with a suitcase, making it convenient to carry and widely used for business trips and travel. Especially suitable for office workers' commutes. ▶【Lots of pockets make it easy to organize the inside of the bag. Functional bags such as computer pockets, mobile phone pockets, and document pockets have excellent storage capacity! Compatible with thin 17-inch laptops! Easy to store 2-3 days' worth of clothes for short trips! #backpack #rucksack