Explore what's at sea effortlessly with the Seac USA Libera Full Face Snorkeling Mask.Features Full face snorkeling mask. Natural breathing through your mouth and nose. Completely separate circuits for fresh air (IN) and exhaled air (OUT). Exhaled air is expelled through a SEAC patented exhaust circuit. Anti-fogging system. One-way valve. A large anatomical hypoallergenic liquid silicone skirt. Snorkel features a Dry Top to prevent water from entering. Two way to adjust the strap, both in front and in the lower section. Quick release buckles. Available in sizes L/XL, S/M for narrower faves and XS/S for kids (10+). Details Fabric: Silicone. Closure: Pull over. Adjustable: Buckles. Country of Origin: Imported.