I just thought I'd toss this idea out there. I got this Neck Wallet many years ago and have found it invaluable over time. Initially it was used to securely carry an ID, passports, orders, cash, and a few essentials.
Now I seem to use it more to carry a few things when I won't have a pack with me and am wearing light clothing, perhaps with out pockets. I guess I use it like a spare pocket or a 'medicine pouch'. And it still gets used to carry a passport when I need one (though that has been less frequent recently).
From today's hike:
No ID in the front clear pocket today, but I did stash a small squeeze light in there (The squeeze light is tethered by the orange cord.). This pouch carries quite nicely outside the shirt or inside.
There are two tiered pockets in the interior:
Today I had a Buck 112 and Streamlight in the front pocket. In the back pocket there is a heavy zip-top bag with a pack of matches, some tinder, and a few first aid supplies. Pretty minimal stuff, but could all be helpful or useful. Now that I look at it, I think my selection of items could have been better. Still, you get the idea. This wallet is small, but it can hold a few useful items, to be sure.
In the past, I have clipped a small button compass to the cord, but I must have taken it off for some other purpose......
On the back of the wallet are a couple of sleeve pockets:
I think one is meant for a pen, but I stash a ferro rod in that. The other pocket contains some tweezers (don't go anywhere without tweezers) and a handcuff key (from more worrisome times).
Anyway, I find this a convenient way to carry a few small items with me when I'm out for a hike and not packing a bag. I'm not sure where I got this particular version of the medicine pouch, it doesn't have any labels, so I can't tell you the maker. However, there are tons of options out there. And you could make you own easily enough, I think.
This is just one of those bits of kit that I wasn't sure I'd use much, but find that I reach for often.