There are safety precautions you should always follow when you use a mermaid tail in the pool. An adult should always be nearby if children are wearing the fins. We do not recommend children under the age of six use the mermaid tail for anything other than cute photo ops. Only experienced swimmers should use the tail and they should be familiar with the “mermaid” swim technique prior to use. The mermaid fins are best used in pools over oceans or places with a lot of moving water. If you do choose to take it without outside of the pool setting, you should only use it if the water is calm and clear. Sizing is important. Make sure you order the size that works best for you. The most important thing to remember is that humans don’t have gills. While it may feel cool to swim like a mermaid, humans are limited by the simple fact that we do require oxygen to live.