1 • Internal capacity
The internal dimensions are a little smaller due to the canvas lining. The largest object that would comfortably fit is 33cm wide x 30cm tall x 4cm deep (so slightly larger than A4).
2 • Shoulder strap
The shoulder strap is 5cm wide (the same as a car seatbelt) and fully adjustable. Like all the larger bags they can be clipped on and off so you can choose your own colour.
3 • Main zipper
This is a substantial YKK #10 zipper, which is more heavy duty than a standard bag zipper without being overkill.
4 • External zipper pocket & key loop
The double-zipped pocket on the outside is perfect for everyday bits and pieces (and fits an iPad). I've recently added a small key loop and clip (the same as I use to secure the straps) for keys (especially useful when travelling for single hotel keys).
5 • Cycling strap anchor point
Another recent addition is a discrete recessed loop on the outside corner. This makes it easy to add a stabiliser strap that prevents the bag moving while cycling etc. These straps are available in the accessories section and can be easy added to any bag with this loop.