1 • Shoulder strap
The shoulder strap is 2.5cm wide (half the width of a car seatbelt) and fully adjustable. It is sewn into the bag so unlike the larger bags cannot be changed.
2 • Main zipper
This is a substantial YKK #8 zipper, which is more heavy duty than a standard bag zipper without being overkill.
3 • External zipper pocket & key loop
The double-zipped pocket on the outside is perfect for smaller bits and pieces. I've recently added a small loop for keys etc (especially useful when travelling for single hotel keys).
4 • Reinforced base
This is a small 4cm flat base that slightly tapers the sides of the bag. The hardwearing black backpack fabric also protects the bottom corners and edge of the bag from wear.