CoolWorld Snorkel Mask Fin Snorkeling Set w/ Dive Mask Dry Top Snorkel Swim Fins L/XL Green Good To Know: -If water leaked in the tube please blow it out through the one-way quick exhale drain valve. In addition the silicone edge is well sealed to prevent water leakage and makes the mask fit your face well and the silicone straps can be easily adjusted for a comfortable wearing experience.