I purchased this online, but it's not what I expected, so I haven't used it. I bought it from overseas, and it didn't have any tags from the beginning. The material seems to be leather, but I'm not sure. It's not flimsy. (The lining is a stiff lining.) Color: It looks slightly greenish, but it's a dark beige. Width: Approximately 33cm at the bottom Depth: Approximately 15cm Height: Approximately 37.5cm Please use these measurements as a reference, as they are approximate. ① There are long, vertical pockets (divided inside) on the front, one on each side. ② The main pocket has two zipper pulls so it can be opened from the center to either side. ③ There are also pockets on each side (quite shallow, so they probably won't fit a water bottle). ④ There is a deep pocket with a horizontal zipper on the back (see the arrow in the third photo). ⑤ Inside, there is a zippered pocket that acts as a divider in the middle (this pocket divides the space into front and back) (see photo 5). ⑥ Inside, on the back side, there is a shallow zippered pocket, and on the opposite side, there is a shallow pocket without a zipper (see photos 4 and 5). ⑦ It comes with a 2-way shoulder belt (this belt is not adjustable. The length is approximately 85cm from end to end of the hardware, and the belt width is 4cm). * The lining is quite stiff. It appears pink in photo 5, but it is actually a glossy dark brown. * The shoulder straps of the backpack are adjustable. It has a handle. I will fold it up for shipping, so please be aware of that. As there were no tags regarding the material, I cannot answer any questions about it. I will answer questions about the appearance as much as I can, so please make sure you are satisfied before purchasing.