First post... Sorry if this info is too wordy.
I have purchased close to ten top of the line PFDs, just in the the past 5 years.
In my opinion, the
Kokotat SeaO2 Hybrid is the overall best vest out there for ski paddling.
This vest has about 3.5kgs of foam flotation (7.5lbs) built in, which is perfect for swimming around the boat after being tossed.
In case of an emergency, there is also an inflatable air bladder built into the vest that can be filled by pulling the cord, or by mouth, that brings the vests flotation up to 10kgs (22lbs) which is the amount of buoyancy found in some offshore type 1 vests. (USCG)
With the SeaO2, you get the best of both worlds. The vest has very little bulk and just enough flotation to work well in everyday situations. Best of all, when an emergency arises, type 1 secondary flotation is there if ever needed.
The lower back and sides of the SeaO2 are mesh and because the PFD has very little bulk, it is very comfortable to paddle in hot weather.
In my opinion it is even more comfortable than a collar type inflatable which always seem to irritate my neck.
Of all the vests I have used ,the Kokotat SeaO2 is without a doubt
the best overall, in comfort, fit and function.
I also have the new Mock vest, which I have to say is beautifully made and fits very well. But the new Mock is a bit bulkier than the SeaO2.
The only shortcoming of the Hybrid Kokotat is the price. It was about 30% higher than what I paid for the Mocke.