The single-lens design of the 180-piece panoramic anti-fog lens snorkel mask allows you to enjoy a wide, unobstructed ocean view while snorkeling, scuba diving, and swimming. The thickened tempered glass features an anti-fog treatment, meaning you'll have a crystal-clear underwater experience without blurring or distortion. Waterproof sealing, perfect fit on the face The swimming mask skirt is designed with soft and stretchy silicone, providing a waterproof seal to the face. The unique ergonomic nose bag can cover your nose well, making the diving mask fit different face shapes perfectly and keeping the goggles from slipping due to water. It ensures children have wonderful fun in the underwater world. Safe and durable tempered glass lens children's swimming mask is equipped with shatterproof glass lenses, which can withstand all kinds of deep water pressure of diving or swimming. Scratch-resistant lenses replace polycarbonate lenses, giving you a clearer view underwater with virtually no scratches on the lenses. Providing you with a safer swimming and diving experience. Soft Nose Cover This kids swimming goggle features a soft silicone nose cover that compensates for the increased pressure your child experiences while swimming, snorkeling or diving. Also helpful for kids who don't know how to stop breathing through their nose underwater. Great for snorkeling and casual swimming. Food Grade Non-Toxic Material The skirt of the children's diving mask and nasal mask is made of food grade silicone, no odor. This swimming mask will not make your child uncomfortable and painful. It is durable, easy to clean and especially suitable for long-term use. Easy-Adjustable Head Strap The straps of the swimming mask can be easily adjusted by easily pressing the button buckle of this children's diving mask, after adjustment, the straps stay securely in place and will not crawl in the water. Suitable for children aged 4-16 years old. Great for snorkeling, diving, swimming training, etc. Makes a great gift for children, tweens, tweens and tweens.