KUYOU Kids/Children Snorkel Set, Swimming Goggles Semi-dry Snorkel Equipment for Boys and Girls Junior Snorkeling Gear Age 5 Plus Adjustable strap: According to head circumference can be adjusted ,suitable your kids. Fits children 5 -12 years old. Designed to fit a wide range of facial profile with comfort The nozzle silicone non-toxic and bleed valve provide comfort at the same time, helping the excess water escaping when expire Note: There guardian and use safe and effective environment