F-Stop camera bags have an adaptable system for trading camera space for other outdoor gear. The swappable section are called ICUs or Internal Camera Units.

This is not a review but just a quick note to record the default layouts of the Pro-Small, Pro-Medium and Pro-Extra Large.

Pro-Small ICU

Internal Dimensions (external all dimensions 2cm greater) Depth: 16.5cm. Width: 27cm Height: 18.5cm External Volume 10.7L

Pro-Medium ICU

Internal Dimensions (external all dimensions 2cm greater)
Depth: 16.5cm. Width: 27cm. Height: 27.5cm External Volume 15.4L

Pro-Extra Large ICU

Internal Dimensions (external all dimensions 2cm greater)
Depth: 16.5cm. Width: 27cm. Height: 46cm External Volume 25L