Features: 1. Full face mask with 2 valves (standard mask only has 1 valve). Dual airflow channels facilitate breathing, and the channel structure separates inhalation and exhalation to ensure that exhaled carbon dioxide and residual oxygen are not inhaled into the body and discharged separately from the outside of the mask. No more worries about lack of oxygen when snorkeling. 2. Our diving mask is designed with an anti-fog film, which is anti-fog for up to 15,000 hours, 100% anti-fog, no fog to obstruct vision, and optimized mirror shape. 3. Multifunctional camera holder design, detachable camera holder, easy to use, record beautiful underwater scenery. You can easily install the camera to capture and share your adventures with friends and family. 4. Our snorkeling mask is made of non-toxic silicone for sealed and waterproof areas, and the mask lining is made of food-grade soft silicone, which will not sweat or leak. The facial diving mask is equipped with an adjustable elastic drawstring, which not only fits the face perfectly, but also can be worn freely to adjust the length of the string. There is no pressure on your head, no dizziness, and you can enjoy snorkeling comfortably. 5. Safety first! According to the survey, it was found that 70% of snorkeling accidents were caused by leaking snorkels! And our snorkel masks are made of expensive food-grade silicone, which is safe, soft and durable. It won't sweat, won't leak, and has stronger wrapping properties to avoid excessive gaps, providing you with better waterproof performance and comfort. Parameter: Material: PC+silica gel Color: black/black, black/blue (optional) Size: L/XL Product size: 240*180*100mm/9.4*7.1*3.9 inches Snorkel length: 400 mm/15.7 inches Product weight: 680 g/1.5 lbs Packing size: 280*210*120mm/11.0*8.3*4.7 inches Package weight: 700g/1.54lbs Packageinclude: Diving mask*2 Note 1. Please allow a bit error due to manual measurement. please make sure you do not mind before you bid. 2. The color may have different as the difference display, please understand. ",