The veshmeshok is not much more than a canvas sack with a single outside pocket and four web straps that allow you to carry a rolled up greatcoat or bedroll. The top has a drawstring closure, probably made from hemp. But the single most distinguishing feature of the veshmeshok is the suspension, such as it is. There is one continuous shoulder strap which is also used as the closure for the top of the bag. The strap is 1.5" wide and lightly padded. It is attached at the bottom corners of the pack.
Lars of the Survival Russia YouTube channel uses a veshmeshok as his scouting pack and has a good video about it, here, in which he demonstrates how to rig the bag for carrying. (Check out the rest of his videos, too. They're awesome.)
If you're in the US, veshmeshoks are easily available on eBay from sellers in the former USSR, but they're also available on Amazon Prime, which is the route I went.
My veshmeshok came neatly folded inside a surprisingly small box, complete with Soviet Surplus Smell. The date stamp inside the bag is faded but I think it says 1977. It's in unissued condition. The canvas is thinner than I thought it would be but it should be more than durable enough for my needs.
Because the veshmeshok is basically a 45cm x 67cm sack, you need to be careful loading it so that it doesn't turn into a ball, or you have things poking you in the back. So, the first thing I put in mine when I transferred the contents of my Hill People Gear Tarahumara over to the vesh was my Z-Lite seat pad. I unfolded the Z-Lite and used it as a back pad inside the pack.
Heavier items went in next, including an Esbit cookset and two Nalgene Oasis 1 quart canteens, one in a USGI cup. Then I put in my first aid kit, cordage kit, brew kit, TP with hand sanitizer and a trowel, a pair of gloves, and my BCUSA MEST poncho. Some disposable hand and toe warmers went into the outside pocket, along with a fleece beanie. My puukko got attached to one of the bedroll straps. Weight of the pack thus loaded was about 16 pounds.
I tried out the veshmeshok on a short hike yesterday. It was surprisingly comfortable with this load, since it's not much more than a string bag.
Adding a day's rations, another quart of water, and some kind of blanket or shelter would bump this up to around 25 pounds. It wouldn't be so comfortable at that weight, but the Russian Army has never been overly concerned with the comfort of its soldiers.
The short length of the shoulder straps was surprising. I am not a big guy although I have broad shoulders for my 5'4" height. With the shoulder straps set to their longest length they're just long enough for me to wear with a winter coat on. To make it a little more comfortable to carry, I added a loop of paracord at the midpoint of the strap and used that to close the sack, and put the pack into carry mode. I got that idea from this thread on BCUSA.
Additionally, the sternum strap is too short for me to make any use of it. It would need to be at least another 8" longer to be really useful. I may sew on some webbing to lengthen it.
You can fit a surprising amount of gear into a veshmeshok. For example, see this page at Operation Eastwind which shows the loadout for a Soviet reenactor.
The veshmeshok won't replace any of my modern packs but it may see use when I feel like going retro. One project I may try is pairing the veshmeshok with a Roycroft pack frame.