This bag closes by means of a zipper. The carrying options for this bag includes a shoulder strap.
From Amazon
Wenger Icons Business Backpack - Sherpa Black - Stylish Laptop Bag with Organizer Pockets
The product is available from £19.65 at international stores.
Conrad Electronic
Wenger Laptop bag Sherpa Double Slimcase Suitable for up to: 40,6 cm (16) Black
Athema Services
wenger icons business sherpa black 600653 - cms01