Whether you're kayaking, rafting, or canoeing, reach for the NRS Oso Personal Flotation Device. This medium profile, type III PDF features a thin, ventilated back design that's comfortable with any type of seat. This back construction broadly distributes PlushFit foam to reduce bulk and improve the overall fit of the PDF. Enhancing fit are the six adjustment points that allow you to create a personalized, comfortable fit for your paddling adventures.