This is a business backpack I purchased on Amazon. I bought it as a spare, but my current bag hasn't broken, so I'm selling this one, which is still new. It's sized to fit a 15.6-inch laptop. The surface is waterproof, and it has a USB port on the side, so I think it's a good functional bag. How about it for commuting or going to school? 【Condition】 I opened it for the photos, but it's unused. ※The last photo is a reference image from Amazon. Instant purchase is OK. Thank you.