Features:This snorkeling mask with dry top system, allows you breathe as naturally as on land.Lining material adopts imported medical liquid silica gel, soft and fit your face.Advanced leak-proof silicone sealing mask with floating ball prevents water from entering in mask.The mask lens featuring anti-fog coating allowing you to see a more clear and colorful underwater world.With elastic head band, easy to put on or take off the snorkel mask.Specification:Color: Black/Pink/Blue/Green (Optional)Material: Silica gelS/M size: Inner diameter 17*13cm; Outer diameter 23*19cmL/XL size: Inner diameter 19*13CM; Outer diameter 23*19CMNote: Please allow 1-3cm (0.4-1.18in) difference due to manual measurement and slight color variation for different display setting.Package Included:1*Snorkel Mask1*Storing Bag2*Earplug1*Accessories set