Three Shoulder Strap Options
Leather Strap
The standard leather strap. It has holes on the strap for adjustment. Adjustable both lengthwise and sideways.

Synthetic Strap
Same as the leather one but the material is a black synthetic material.
Synthetic Adjustable
An upgraded version of the standard synthetic strap that allows for fine adjustments of the length as you are not confined to the holes as in the standard strap.
Synthetic Velcro
The synthetic strap with velcro fastening for easy fine adjustments both in the length and sideways.