This is a topology bottle sacoche. It comes with a strap. I bought a wider strap because I heard that thin ones can cause shoulder stiffness. It seems that a men's long wallet with an outer zipper doesn't fit with much room, so I used it about twice and decided to sell it. Please check the corners and zippers in the images. Although it has been used infrequently, please purchase it with the understanding that it is a used item. No price reduction and no returns, please. If you are purchasing the phone sacoche bag and strap I am also selling together, please contact me before purchasing. Thank you.