Seavenger Silicone Tempered Glass Mask Dry Top Snorkel Combo Set Dry Top Snorkel. For snorkeling, the most desirable snorkel is this Dry Top. Single Lens Mask. The panoramic view you are looking for in a snorkel mask. One size fits all silicone face skirt fits a wide range of faces Pro buckle system provides quick and easy strap adjustmen. Amazing low package price and good for traveling.