First Class (by Stearns) ISO EN12402-5 approved 50N buoyancy jacket for descerning sailors. The side fastenings mean you can tighten this up to a snug fit.
The soft SECU-Foam acts as a cushion for the body even under toughest regatta conditions.

50N - Buoyancy and swimming aid. This is not a lifejacket.
For regular swimmers. To be used near the shore.