The BRS Safety Molle Vest has been used by soldiers in the US military conducting field work. These vests aren't issued to front line forces they were issued to crew who would go out and perform technical work on behalf of their unit. This included every type of work from survey crews to environmental response teams who were all issued these vests as part of their unit mission.
A little too big for my small frame, but it has good customizability. Breathable and it has a slot for a camelback of you need it