| Body Weight | Chest | Minimum Permanent Buoyancy |
Small | 110-132lbs (50-60kg) | 80-90cm (31-35") | 9.0lbs (40N) |
Medium | 132-154lbs (60-70kg) | 90-100cm (35-39") | 10.0lbs (45N) |
Large | >154lbs (>70kg) | 100-110cm (39-43") | 11.0lbs (50N)Â |
Extra Large | >154lbs (>70kg) | 110-120cm (43-47") | 11.0lbs (50N) |
XX-Large | >154lbs (>70kg) | 120-130cm (47-51") | 11.0lbs (50N) |