Seac Diablo is the training mask for adults who practice swimming at an amateur and competitive level and seek an alternative to swimming goggles. Features: Hypoallergenic silicone skirt for maximum softness and comfort Lenses: Over 180 degree peripheral vision Provide 100% UV ray protection Anti-fog and scratch resistant coating Clear lenses for indoor and lower light conditions Dark lenses for bright light conditions Pulsar+ System for quick adjustment of the buckle on both sides One size for adults Seac Diablo Goggles