Material: Material: ABS silicone Color: Black，Blue，White，Pink Features 1. Dual Airflow Anti-Fog Technology The Dual Airflow Technology Can Help You to Breathe Naturally as On Land. By Changing The Inspiratory and Expiratory Airflow Channel to Achieve Anti-fog Effect 2. Sealed In Water, Top Value Automatically Locked to Prevent Water From Entering Through the Snorkel Tube 3. Drain Valve When Water Entering the Mask, You Just Need to Raise Your Head The Water Will Flow Out From The Drain Valve. 4. Full Face 180DEG Field Of Vision, Unprecedented Visual Experience 5. Medical Liquid Silicone, Soft, Durable, No Odor, Safety for Your Scuba Easy Dressing Adjustable Elasticated Textile Strap That Does Not Pull Your Hair Out Note: The Camera Are Not Included (without camera) Washing method: Properly clean the mask after use to keep the vision clear and ensure that the ventilation function is normal to prevent fogging Storage: Dry naturally after washing to avoid direct sunlight Size： S/M size: inner diameter 10-12CM, L/XL size: inner diameter 13-19CM, Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.