This is BLACK EMBER WPRT MINIMAL PACK Retail price: around 30,000 yen I purchased this new and have only used it a few times for trips home and travel, so it's in pretty good condition. There is some minor surface dirt, but there is no sweat staining on the back or straps, and it still retains its stiffness. This is a backpack with a waterproof design and a solid look. I think the roll-top style is a rare model. The basic specifications haven't changed, so you can expand it with various parts. From business to private use, please consider this sophisticated backpack. Feel free to comment. Thank you.