WSTOO 180° Full Face Snorkel Mask-With Anti-Fog Anti-Leak Snorkeling Design,See More Water World Larger Viewing Area

Product:snorkel mask
180° Full Face Design allow you to simply breathe through your nose or mouth when you are snorkeling
Second Generation Snorkel Technology stops all water from entering the breathing tube and mask.
Easy to adjust size and comfortable with your face,great unrestricted view and allowed you to concentrate on what was around You.
Preparation:
Make sure there is no sand on the mask or tube, if there has sand,using water to clear the breathing tube or mask,once the mask is clean then it ready for use.
Checking the seal:
Pull the straps of the mask over your head and check the fit of the mask on your face,breath normally to check for any leaks,if you feel slight pressure change when you breath,then you have a good seal,if not ,please kindly adjust the mask wire size.
Using:
Once in the water,swim on the surface and breathe calmly through your mouth or nose,if you feel light headed remove the mask immediately, keeping your chin slightly up will create the best breathing experience, if you feel any obstruction to your breathing, it may be due to the snorkel being covered in water temporarily , the dry top snorkel design will prevent water from entering through the top of the snorkel , if water leaks into your mask,simply lift your head out of the water and it will drain out of the chin valve,no need remove your mask to clear it of water.

Field of view: polycarbonate shatter mask, safer .180 degrees horizontal field of view, experience terrestrial high-definition vision and natural breathing.
Smooth breathing: the combination of the mask and breathing tube, the top Dry Drop system in the water can automatically close the valve to prevent water inflow, the user can use the mouth and nose for natural breathing
Anti-fog: the principle of the design of the fan, the effective physical anti-fog, the natural use of the nose and breathe out the air, no breathing tube, get rid of discomfort, more health
Seal: transparent anti-allergic silicone skirt fit the skin, wear more comfortable, better sealing, the top waterproof valve to prevent into the breathing tube
The product includes Go Pro accessories and net bags.
Dimension selection: Measure the length of the bottom of the bridge of the nose and chin. If the length is less than 4.75 inches, select S. If the length is greater than 4.75 inches, select L