The problem with the tactical vests like the LBT and the Blackhawk is that while the flotation material is Coast Guard approved, the vests are not. At least none that I have seen.

If you are going to use it in an aircraft, DO NOT buy anything but an inflatable. It is often hard enough to get out of a cabin without being pinned to the high point (sometimes the floor) by your PFD.

Read Doug Ritters discussion on aviation vests on ETS. Although it is out of date (anything we can do to help Doug?) there is lots of good information on how to select a vest and how to use it.

See also Doug's Web Site for the Doug Ritter
Essentials™ Overwater Aviator Survival Vest™ based on the Switlik vest. The one he uses does not appear to allow for a hydration bladder, but I am sure it is a good one, I have seen nothing from him that isn't.

Respectfully,

Jerry