This is not the Type I lifejacket you're used to!
This vest-style, Type I PFD is very comfortable, and offers safety and reliability in offshore situations.
It is designed to keep most unconscious wearers face-up, and provides a minimum of 22 lb of buoyancy.

Offshore PFD with two encircling body belts and one adjustable chest strap
Release buckles adjust the two upper closures; waist belt is adjusted by tying
Non-reversible
Contoured neckline for comfortable wear; hinged head support is out of the way when not in use
3M Scotchlite Reflective Material SOLAS-grade 6755 panels on upper chest and back
Mounting loop for light on shoulder panel
Universal size for adults with chest dimension 32" to 52"