2018 Premium full face snorkeling mask. TF Essentials use longer breathing tube, allowing you to stay longer in the sea and enjoy more marine life, which will give you a better diving experience. 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. Specifications: Material: Liquid Silicone, PC Dimension: 22.3*19.4*23.4cm / 8.7*7.6*9.2 inch Inside Size: 17.6*14.5cm / 6.9*5.7inch (S/M) 19.5*14.5cm / 7.6*5.7inch (L/XL) Weight: 396g / 0.87 lb Package Contents: 1x Snorkel Mask 1x Earplugs (pairs) 1x Storage Bag 1x User Manual
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