The Revere Inflatable Vest Automatic/Manual is a very affordable safety product for you and your other passengers in your boat and a PFD for every person is the law. 
Type III Inflatable
Designed for persons of weights greater than 80lbs. (41 kg) and chest sizes between 30"-52"
22 lbs. (110 Newtons) of buoyancy
400 Denier nylon cover
Chamber: Urethane Coated 210 Denier nylon
Nylon closure
1" wide webbing and 1" buckle
Halkey-Roberts 1F Automatic Inflation (auto models)
Corporal 3F Manual Inflation (manual models)
Co2: 25gram Co2 cylinder
Clear status window
Back-up oral inflator
Includes rescue whistle and lanyard
625 cubic inch (10.2L) inflated volume
Rearm kits available for all models
Weighs only 1 lb. (.45 kg)

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Image(s):    Revere Inflatable Vest