plasticPROTECTION & CLEAR VISION -Supertrip Kids Snorkel Mask is made of tempered glass lenses can resist scratching & withstand deep-water pressures and resistant to break. The kids snorkeling mask provides 180 wider clear vision and brings children a interesting diving experience.ANTI-LEAK DESIGN -This Kids Diving Masks skirt is designed with soft and flexible silicone, creates a watertight seal with the diver's face.Comfortable and no leaking.it is the best choice for children and junior.SOFT ADJUSTABLE BAND -The Kids Scuba Mask push button buckle for easy strap adjustments, and alleviate the pressure from our back head.Fit a range of children's faces. A great gift for kids snorkeling lovers.SAFE MATERIAL -Kids Diving Goggles skirt is made of soft hypoallergenic silicone.Safe and comfortable.Designed to fit a wide range of facial profile enough to make boys and girls comfortable when diving or snokeling.CUSTOMER ORIENTED SERVICE -All Supertrip child snorkel mask are designed for smaller, narrower faces. Fits most children and young adults 4-14 years old. This kids snorkel goggles come with 1 mesh bag and 1 earplugs.We put customer satisfaction as our number one priority. If you have any questions, please feel free to contact us. THANK YOU!