If you are looking for a floatation device that has adjustable fit, and is designed specifically for mobility and use with either waist or seat harnesses this is the solution. CE EN393 approved means floatation and quality of manufacturing as a floatation vest.
Side adjusters create the right fit for over the wetsuit or without.
This vest is made to work with both waist and seat harnesses. Due to the wide arm openings it is very comfortable and it's also ideal for Stand Up Paddle use.