Don't put heavy objects on it or use it for a knee pad or fender, it can lose buoyancy when crushed. Don't leave your PFD on board for long periods when the boat is not in use, the heat can degrade its flotation. Don't dry your PFD in a dryer, on a radiator, heater, or any other direct heat source. This can degrade and damage the buoyancy material. Don't let your PFD lie out in the sun when the boat is not in use.
Sunlight weakens some synthetic fabrics very rapidly.
Don't leave your PFD onboard for long periods of time when the boat is not in use, the heat can degrade its flotation. Don't dry your PFD in a dryer, on a radiator, heater or any other direct heat source. This can degrade and damage the buoyancy material. Do let your PFD drip dry thoroughly before putting it away. If your PFD has been in salt water, rinse it thoroughly with fresh water.