S/M L/XL Portable Diving Mask 180° Full Dry Snorkel Mask

Features: 1. The Design Of The Exhaust Fan Principle, Effective Anti-fog, No Need For Breathing Tube, Dry Dop System, The Top Valve Automatically Closes After Entering The Water To Prevent Water From Flowing In. 2. Elastic Headband, Easy To Wear Without Hanging Hair, Super Wide Shatterproof Mask. 3. Suitable For All Types Of Gopro Cameras (gopro Hero 1, 2, 3, 3+ 4...) 4. 180 Large Field Of View, Physical Anti-fog, Full Dry Waterproof, Detachable And More Convenient. Specifications: Material: Silicone+PC Color: Black, Sky Blue, Pink, Green Size : S/M, L/XL Polycarbonate Shatterproof Mask Lining Material: Liquid Silicone S/M Size: Inner Diameter 17*13cm, Outer Diameter 23*19cm L/XL Size: Inner Diameter 19*13cm, Outer Diameter 23*19cm Size Purchase Advice: Eyebrow To Chin Length Less Than 15 Cm Recommended To Buy S/M Code Greater Than 15 Cm To Buy L/XL Package Included: 1x Diving Mask