SAFETY TEMPERED-GLASS LENS: The lens of swimming goggles is made of tempered glass, with good impact resistance and shatter resistance, can withstand the pressure of deep water, and has high safety. Lens of diving goggles is treated with anti fog treatment to provide you with a clear underwater view. COMFORTABLE NO LEAK: The skirt and nose cover of swim goggles for adults are made of soft food grade silicone, comfortable to wear and good sealing, fits face without causing pressure. The space of the nose mask is large enough to accommodate the high nose bridge. So you can fully enjoy snorkeling, diving and swimming. EASY TO ADJUST: Adjustable buckles on both sides of diving mask help you adjust the headband to the tightness you need without slipping. Widened headband design for snorkeling set makes you more comfortable to wear, suitable for both men and women. ATTENTION: Please do not wear dive mask to jump into the water, or it may break. For safety, please do not do this. Do not expose the lens of swim mask to the sun for a long time. PERFECT AFTER-SALES SERVICE GUARANTEE: If you are not satisfied with the product, please feel free to contact us, and we will provide you with a full refund.