DescriptionMade of silicon & PC, this kind of diving mask has a breathing tube with dry technology, so you can breathe freely underwater. Besides, it also has double air-flow channel, that is inhaling and exhaling separate channels for anti-fogging. I believe it is what you need. Don't hesitate!Features- Color: Black. - Size: 19x49x6cm - Material: Silicon + PC. - Low volume design for better visibility and easier clearing. - Made of material for long lasting use. - Drain value in the mask, to drain away the water by raising up your head when water leaking. - You can also send it to your friends who like diving sports as a gift. - for diving, swimming, snorkeling and other underwater activities.