How to use: Just slip the bracelet on your wrist and adjust it to your desired size as it can be adjusted from 7 to 13 inches. It's waterproof, so you can wear it while swimming or at the beach. Note: Although it's waterproof, try not to expose it to harsh chemicals. Maintenance: If it gets dirty, you can gently wash it with mild soap and water. Then let it air - dry. Keep it in a dry place when not in use.