Description Made of premium material, this kind of snorkel mask set has a breathing tube with dry technology, so you can breathe freely underwater. Ergonomic shape, more close-fitting, better sealing, I believe it is what you need. Don’t hesitate! Features – Material: PC, Silicone, PVC, Tempered Glass. – Skirt and strap come in soft, supple silicone, which molds to the shape of your face for comfortable fit and watertight seal.  – Dry tops design keeps water out, the snorkel features both an anti-splash guard and a closing valves.  – Our mask has a wide-angle lens made from tempered glass. Mask incorporates anti-fogging technology to provide a clear view of the ocean. – Ergonomic mouthpiece designed to reduce jaw fatigue for maximized comfort.  – It will make your snorkeling, free diving experience much more enjoyable. Features: Anti Fog Brand: Shuliwen Color: Blue Manufacturer: ETEREAUTY Assembled Product Weight: 0.86 lb Assembled Product Dimensions (L x W x H): 16.14 x 3.54 x 1.38 Inches