Imagine a swimming aid made of cotton! PVC-free, phthalate-free, BPA-free! Not even a plastic or rubber valve to inflate it. Not only that, but it is a superior swimming aid that will really help your child learn to swim. It was invented by German swim instructor Marga Jenner in 1936 and has been popular in Germany ever since. One size fits all, babies, children, even adults! Just use the adjustable buckle. Ideal for the handicapped. Under supervision of course.