I’ve got a Bjornklader vest. Very well made like all of their products. Chest pockets, zippered pockets, hip pockets sort of like pouches and tool loops at left and right sides. Heavy-ish canvas and a mesh back Makes it somewhat breathable. The downside is that it only comes in black.
Not terribly uncomfortable in the warm weather but if it’s really hot or muggy I can’t even stand to wear my occy bags.