Testing a flotation device

To test and become accustomed to your life jacket or buoyancy aid, you should wear it in shallow and calm water or in a pool where your feet can still reach the bottom.
The flotation device should be properly fastened, and loose ends must be tucked away.
It should stay in place and not slip over your chin.
After fastening, lift your feet from the bottom and check the buoyancy of your jacket.
Your chin should be well above the waterline.
If this is not the case, a jacket with more buoyancy must be selected.