Sleek Onyx M-16 belt pack. Ideal for convenience and style. This is a “life vest“ alternative. Worn around the waist while paddle boarding, this low profile design is number one choice for racers. To inflate, pull the yellow hanging tab. Never been used! The inside cylinder has slight corrosion from being outside in salty air. Once opened, the unit is reusable, just filled up into itself and replaced the cylinder.