[[Natural Comfortable Breathing] This snorkel mask ensures fresh air flows easily for safe breathing with minimal effort. In addition one-way valves and separate breathing chambers completely separate circuits for fresh air and exhaled air which means you will not breathe in the same air you’ve just exhaled. [ Anti-Leak & Anti-Fog System] The silicone skirt comfortable seals around your entire face which decreases the chance of water getting in when you’re snorkeling. The one-way valves and separate breathing chamber allow for fresh air circulation that not only keeps CO2 levels safe but also significantly reducing fogging. [Better Visibility] This full face snorkel mask equipped with a flat lens that extends behind your eye and provides a clear view without any distortion. So this snorkel mask gives you a clear view through the lens while you snorkel. [Easy to Pack Up] A detachable design makes the snorkel mask easy to pack up transport and store it also comes with a mesh carrying bag being convenient to take it anywhere you want. "[Specifically Design for Kids] This model is specifically design for kids you can choose easier the size is measured from the bridge of kids nose to chin.(Size S : 8.5-10cm/3.35-3.94 inch)." [Tips for Snorkeling] Full face snorkel masks are designed for leisure surface snorkeling. Not recommend for serious free diving. Never snorkel alone. Try it in a swimming pool and make sure it fits and seals.]