Phantom Aquatics Mask Fin Snorkel Set with Mesh Bag, Adult These Snorkeling fins are easy to get on and off your feet thanks to a quick-release strap system Angle of blade is optimized for maximum thrust with minimal effort Center groove on each fin channels water to enhance glide Mask features beveled sides that provide a wide field of vision and an adjustable head strap with quick-release buckles Specialized dry top prevents water from entering snorkel even if submerged, ensuring you won't be surprised by inhaling an errant wave