I purchased this on Amazon. I tried putting small items in it and wearing it indoors, but it was a bit too small for me, so it's been stored in the closet. I haven't used it outdoors. I'm selling it because I don't think I'll have a chance to use it in the future. It's lightweight and compact. I think it's suitable for short outings, walks, or as a sub-bag when traveling. Approximate storage capacity: 500ml PET bottle, wallet, smartphone, keys, etc. https://www.amazon.co.jp/dp/B076F8RZW1?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_16&th=1 ↑ This is the product page. Please refer to it. Size: 40cm (height) x 17cm (width) x 7cm (depth) Number of pockets: 2 (1 outside/1 inside) Weight: 190g Sole material: Polyester Outer material: Polyester Closure type: Zipper Country of origin: China Brand: OUTDOOR Color: Gray Design: Sling bag Number of pockets: 2