HEAD Combo Marlin Mask Snorkel Set Scuba, Freediving, Snorkeling Designed to fit most adults Two lens windows for a low profile combined with wide field of view Soft, hypoallergenic transparent silicone conforms to many face shapes and seals out water without the strap being too tight The snorkel top acts like a splash-guard while on the surface, and will automatically close to seal out water when the wearer dives under the surface Hypoallergenic silicone mouthpiece and lower flex section for more comfort