For a very long time I have used cross chest/bandolier style carry binocs, with whatever strap the maker supplied. Seemed fine to me. I confess though I'd been thinking of something perhaps more comfortable, more stable AND more protective of my binos. This latter being maybe the more important. There was a thread several months back where someone setup a survey asking how members carried. Somehow, that inspired me to act and I ordered a Kuiu chest pack system. Youtube videos of it looked good. The "to front" opening and closing top lid, with simple pull loop, and the enclosed sides, promised a bit of ease getting binos in and out, along with better protection from the elements as I hike about.
There seems a problem, not anticipated by any of the conversations here or promotional videos. Looking at the Nyack website it seems potentially the same issue may exist with those. These various harnesses and packs appear (in marketing literature), to be very well designed to offer lots of weight distribution away from the neck. As well they all seem to position binos up on chest, close to face, for fast deployment. The problem I experience is that the whole thing depends on strap adjustment, thats tight around chest/toros. Even so, the binos in pack, as you hike, want to sag to the front. the lower bottom edge of the whole rides against the lower chest, while the top outer edge sags outward away from chest. Part of this is do to chest size, and conformation. I get it. It would seem the solution is to shorten the straps falling over shoulders to the front to position the harness/bino higher on the chest. Problem is that depends on the strapping across the back to be stable, stay in place. It doesnt. When shortening frontal straps all looks good at home. You go walk about, breathe, move, stretch and the back harness rides up allowing the binos to droop down again. If Im doing something wrong, help please? It seems though a better, more stable system really requires some sort of attachment down to a belt loop or belt at the back.