Features: Anti waves, waterproof, and large volume air flow snorkel tubes, with silicone snorkel mouthpiece and hose. Simple and fast to use, easy to attach mask strap, help you enjoy your diving adventures. Water and air separated double waterproofing design, better ensures the life and safety of users. Has a water stop system constructed by a large air inlet and a water stop valve. Ergonomically designed comfortable mouthpiece to reduce soreness in the mouth while snorkeling. The view brought by the toughened tempered glass lens allows you to enjoy unlimited scenery. Specifications: Mask Frame: PC Mask headband: liquid silicone Lens: tempered glass size: 165 * 88mm Breathing tube Mouthpiece, hose: liquid silicone Tube: PVC Other: PC Notes: 1. Please allow 1-2cm (0.4-0.8") differences due to manual measurement, thanks. 2. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. Package included: 1 x diving mask