I do not use it as a Chest-Rig but have, still Kudos to Peak Design, attached a strap of that brand to both attachment loops at the top.
Normally I have it in my day backpack. In Scotland, I plan to hang the camera loose around my neck.

Simply because I ran out of space in my backpack.

Be sure to click on the link above for the brilliant rain cover that comes standard at the bottom of the cover.