Description Specification: Inner diameter: 17 * 13CM Outer diameter: 23 * 19CM Weight: 554g Material: PC + ABS + Silicone Color: Black br/>Package Contents:1 x Diving MaskPanorama Full Face Snorkel Mask: Foldable snorkel mask gives you more choices - our full face snorkel mask and snorkel offers 180 degree visibility for beautiful underwater -Adventure.Anti-fog: The separate inhalation and exhalation channels prevent the diving mask from fogging in physics, the engineering design fits the nose more tightly, effectively prevent the exhaled gas from entering the mirror area, don't worry to avoid mask fogging. Ear Pressure Equalization Function & Earplugs: The snorkeling mask with soft silicone nose design, you can wear the earplugs and equalize the pressure by pinching the nose to relieve discomfort when diving deeper into the water