This is a 2-way briefcase from Complete Works, the original brand of the select shop, Collectors. It can be used as a handheld briefcase or with a shoulder strap. *It does not convert into a backpack. I purchased it at a Collectors store for business trips during the height of the COVID-19 pandemic, but I only used it twice. I've decided to sell it while it's still in good condition since I don't see myself using it in the future. The main compartment has two sections, making it convenient for storing a PC and documents, as well as clothing (it easily fits two shirts and underwear). Inside the main compartment and in the two outer pockets, there are numerous small dividers and zippered pockets, which are useful for organizing small items. The photo of the bottle holder shows a 700ml Coca-Cola bottle, but it can also fit a 1L bottle. The included PC sleeve (photos 8 + 9) fits a 12-inch or 13-inch PC. *A 15-inch PC will not fit. Made of 1680D ballistic nylon fabric, it's very durable and resistant to scratches, even with rough handling. It has a sturdy construction and thin padding, allowing it to stand upright beautifully even when lightly packed. Both the exterior and interior are very clean, with no scratches or stains. The shoulder strap in the last photo is unused. Size: Width approx. 46cm, Height approx. 31cm (to the base of the handle), Depth approx. 16cm Color: Navy If you are located in an area eligible for Eco-Mercari shipping, please agree to ship via Eco-Mercari after purchase. TUMI BRIEFING SOMESONITE PORTER Yoshida Kaban Color...Black Bag Size...A4 size compatible