Product specifications Name: Diving mask Material: PC+ABS+silica gel Conventional colors: blue, pink, black Please measure the length from the Eye to Chin. If the length is between 8.5cm-10cm(3.35-3.94inch), it's suitable for Children If the lengthis between 10cm-12cm(3.94-4.72inch),it's suitable for Teenager If the lengthis over 12cm(4.72inch),it's suitable for Adult Product characteristics: 1.180FULL FACE DESIGN: Our snorkel mask provides 180 Panoramic view, makes it easier than ever to breathe comfortably through your mouth or nose while you are snorkeling. you will see more fish and undersea world than ever before! 2.COMFORTABLE TO WEAR: be made of hard PC, snorkel mask adult anti fog is non-toxic and odourless; wrapped by soft and thick silicone, it protects your safety and won't make you headache for longtime wearing; free breath and no need to hold a breathing tube in your mouth and clinch your jaw the entire time. 3.EASY BTEATH & ANTI-FOG DESIGN: Full face snorkel mask allows user breathe through mouth or nose while snorkeling with no mouthpiece. With snorkel tube allow you to diving deeper.Separate inhaling and exhaling channels that creates an airflow away from your main viewing Vision that helps eliminates fogging and will keep you snorkeling longer. 4.SAFE EESPIRATORY SYSTEM: A ball at the top of the tube will automatically seal the air valve to stops salt water from getting into your mouth and prevents gagging, Spend less time worrying about water in your mask and more time snorkeling. 5.FOLDED-SNORKEL DESIGN: Fold the tube by gently push a button,you will never worry about the falling-off or leakage during your snorkeling, This mask will serve you for a long time and perfectly solves the non-folding snorkel masks' problem and the installation difficulties, like easily damaging the buckle and easily lose your snorkel mask. Package includes: 1 * full face snorkel mask (children/youth/adults) Notices: 1.Please allow 1-2mm differs due to manual measurement, thanks. 2.There could be some slight differences in the color tone of the pictures and the actual item. 3. If there is any problem with the product, please