Cressi Matrix Mask & Dry Snorkel Set 100% hypoallergenic crystal clear liquid silicone skirt | Double feathered edged skirt Wide split silicone mask strap | Extreme downward visibility Internal volume is minimal | Unique pressure buckle design Two tempered inverted tear drop lens Extra large self-draining chamber for easy water purging | Ergonomic streamlined designed tube | Angled hypoallergenic silicone mouthpiece and corrugated section | Snorkel keeper utilizes a quick release system