The listing, Free Breath Full Face Snorkel Mask for GoPro has ended.
I bought this for my son but he never used it, brand new. Here's the details and pictures from the ad.
BEST HELPER IN THE HOT SUMMER --- 2017 new upgrade full face snorkel mask, offers a 180° panoramic viewing area. Full dry breathing tube makes it easier than ever to breath with your nose or mouth underwater. Enjoy the underwater world comfortably!!!
NEWEST FOLDABLE DIVING MASK WITH GOPRO MOUNT --- Just fold the tube by gently push a button, foldable and longer snorkel tube design makes it easier to install and take off and carry out. Equip with detachable GoPro mount, let you liberate your hands, enjoy and record the wonderful deep sea world
ANTI-FOG & ANTI-LEAK DESIGN --- Unique dual airflow design, separate inhaling and exhaling channels effectively stops the mask from fogging up in physics. You can freely breath via your nose or mouth. A ball at the top of the tube will automatically seal the air valve to prevent water from inflowing the mask when submerged, leakage-proof performance is strong, keep you snorkeling longer and deeper
PREMIUM QUALITY AND ECO-FRIENDLY MATERIAL --- The updated 2nd Gen snorkel mask is ergonomically designed. The flat mirror is made of high quality PC ,to ensure clear visibility is guaranteed under any condition. The environmentally hypo-allergenic liquid silicone ensure high sealing and comfortable wearing, safety and durability. Soft and fabric straps ensure snorkeling gear stays on your face and won't snag hair or skin