I purchased this about two years ago, but I haven't had much opportunity to use it recently, so I'm putting it up for sale♪ It has a minimalist design and can be used both on and off duty. Here's the description below↓↓ Brand: MAN-SEL Type: Backpack / Business Backpack External Dimensions: W330 x H460 x D90 [mm] Weight: 830g Material: Polyester (PU processing) Storage: A4 / B4 (file size) ATTENTION * This product is not completely waterproof. * Due to the nature of PU material, white marks may appear after water exposure, but they can be removed by wiping with water and then wiping dry. * Please refrain from using waterproof sprays or wallet tissues containing chemicals, as they may cause stains. Simple and functional black backpack with adjustable straps. Thank you for looking!!