Ocean & Earth Mens Free Dive Mask and Snorkel | 2021  The new Ocean & Earth Mens Free Dive Mask and Snorkel features silitex with large single lens for wide field of vision. This mask has been designed using quality clear synthetic silitex for clarity, performance and comfort in the water. The frames and lens also feature a high impact guard with excellent water-tight seal. The adjustable non-slip head strap makes this the perfect dive mask for any ocean adventure.