Using the Bestway Dominator Snorkel Mask is easy. First, adjust the head strap to fit your child's head comfortably. Make sure the leak - resistant edge skirt seals well around the face. Put the snorkel in your child's mouth, ensuring the soft mouthpiece is in place. When swimming, the splash guard will keep water out of the snorkel. Remember, this mask is for children aged 3 and up. Don't forget to check the head strap regularly to ensure it's secure. After use, rinse the mask and snorkel with fresh water and let them dry in a cool, shaded place. Avoid leaving it in direct sunlight for too long as it may damage the polycarbonate lenses and the UV coating. Also, if you have a style preference, add a note when you order. But keep in mind that styles are randomly selected at dispatch based on availability.