Frontier Full-Face Snorkeling Mask - Adult Sizing - Eye to Chin > 4.5 - Green/BlackFeatures:180Adeg full-face design provides a superior viewLightweight, frameless mask, 369 gramsSoft, durable silicone skirt provides comfortable, water-tight seal and maintains shape over timeAnti-fog designDual airflow technologyBreathe naturally, through nose and mouthCombines dry top and purge valve to keep water outBuilt-in earplugs (retractable)