In reply to tony:
> I like my Ultimate Direction SJ Ultra 3.0. I wasn't sure how I'd get on with this kind of vest-type pack, as opposed to the more traditional type, but it works well. It's only 7l capacity, so may be on the small size for you, but I think the JK Ultra is bigger. The both have a pair of soft chest-mounted 500ml bottles, which are ideal - much better than bladders.
I think you mean the AK (Anton Kupricka). I've got this - it's 11.5L but feels much bigger - certainly would be big enough for any semi supported ultra. I've used for up to 18 hours and love it. The pockets are in great locations and everything is easy to get to. The material is comfortable and since I use Z type trekking poles they stow under each armpit pretty well.
The only downside is I occasionally get rubbing on my chest on one side from the neck of the bottles/soft flasks but I seem to have sorted that with some adjustments.
https://ultimatedirection.com/ak-mountain-vest-3-0/
> However, it's not cheap.
I think it's reasonable considering it's at the top end of the market (I think I paid ~€140) and quite frankly you get what you pay for mostly. Before this I used a Salomon S-Lab vest and the zip broke, and although I loved the vest, it was comfortable etc I yearned for a few more pockets and wanted to switch from bladder to flasks.
I've also tried the lower end Decathlon ones and if you're going to be seeing the sun come and then go down again wearing the same vest, you want it to be a good one, and I'm afraid I've not seen one at that price point that cuts it.