คำอธิบาย
Water is most likely to flood the nose and mouth area when gaps open in the seal between mask and skin. This may happen, for example, if the mask rides up on the face, and if leaking occurs at the cheeks when you are adding a mouthpiece or at the the corners of the mouth when you grin underwater. Here, to avoid compromising the seal when your facial muscles move, the mask form is optimized to maintain fit and feel.
