I use the older Orvis safe passage "chip" chest pack, which is quite small. I like it because it makes me think about what I am taking as before, I was filling up my waistcoat with boxes and items I would never use..
I use the slim fly boxes, and add a few spools of nylon, some floatant and a few tapered leaders. That's about it.
Super light, does not get swamped when I wade too deep unlike my old waistcoat, and if I fall in, it wont hinder my swimming.
