As a swim instructor, one of the most frequently asked question I hear is about my skin. “Don’t you get all pruny?” Kids will often exclaim at their ‘raisin fingers”. I always thought it was from dehydration, or the weather.

Low and behold, it has to do with Keratin, which is a protein, in the outer-most layer of your skin. It’s job is to protect our skin from dirt, bacteria and moisture.

When over-exposed to water, the layer of keratin can no longer block out all the water, resulting in the osmotic action of water moving into your cells. This causes the skin to wrinkle and “prune”.

Thankfully, it’s not permanent, or even the youngest of swim instructors across America would look like senior citizens!