I think this is pretty significant advice. My daughter broke her foot one day before getting on a plane to Barcelona, where we planned on doing a lot of swimming, I had a waterproof cast cover over-nighted and they sent two. One for me and a free one for the foot doctor. The product worked so well, it literally saved our vacation and I couldn't say enough good things to the doctor when we got back. I'm sure giving the free sample to the doctor was a win for them, especially considering the doctor had never heard of the product.