?ADVICE FOR USE?This comes from the advice of the lovely people who have been supporting the use of the HJKB snorkel masks. Each installation and removal can be done by wetting the breathing tube with water before installing it or removing it. This greatly enhances the experience of using the HJKB snorkel mask and protects it. This is a tip for easy snorkel fitting. Thank you to everyone who has supported the HJKB brand. ?FAST SHIPPING & HIGHT QUALITY?HJKB full-face snorkel masks create a comfortable and safe snorkeling experience for you. HJKB is committed to providing quality products to our customers, if you are not satisfied with anything, contact us to return for replacement or 100percent refund, your feedback is an important asset to us, we will reply and solve your problem within 24 hours. ?MEDICAL ORIGINAL MATERIAL AND SIZE?HJKB Full Face Snorkel Mask Made of High-Quality PC and Medical Grade Silicone. Non-toxic and environmental, which can prevent skin allergies or other skin problems caused by original materials. The size is measured from the nose to the bottom of your chin. If less than 4.7 in(12cm) and please select size S/M, if more than 4.7 in(12cm), and please select size L/XL. Generally, S/M is for women, and teenagers(Also applies to older kids), L/XL is for men. ?INHALE IN MORE SMOOTHLY?HJKB Snorkel Mask adopts two breathing tubes, compared with the old snorkel mask, our double vent full face snorkel mask makes breathing more smooth. Feeding fresh air circulation by the mouth and nose together, makes you more relaxed while snorkeling. The new breathing mode avoids blockage of a single breathing tube and doesn't worry about leaks or choking water. ?180° PANORAMIC VIEW & ANTI-FOG WIPES?Optimized lens shape and delicate lens for the wider field of view and 30% better distortion-free visibility. To remove CO2 in time, when it exhales from the outlet, some bubbles will be created which may temporarily affect your vision but will make you safer and breathe more smoothly. Each set of snorkeling set is equipped with an anti-fog wipe, wipe the internal mirror before snorkeling can reduce the fogging to some extent. ?HJKB INDEPENDENT PATENT RESPIRATORY SYSTEM?HJKB invited dozens of designers from the UK and Australia to create this unique snorkeling breathing system. We use unidirectional circulation breathing separation to separate the exhaled and inhaled mechanics so that exhaled CO2 and residual O2 are expelled quickly from the outlet. HJKB provides a safer snorkeling experience for you!.

Valve Type: Float. Lens Type: Single Lens. Material: Silicone, Polycarbonate. Color: Black & Blue. Brand: HJKB. Date First Available: November 13, 2020. Best Sellers Rank: #17,881 in Sports & Outdoors. Customer Reviews: 4.3 out of 5 stars 1,271 ratings 4.3 out of 5 stars. : B08NCFNGG9. Size: ?Large-X-Large. Part Number: ?HJKB-857. Manufacturer: ?HJKB. Suggested Users: ?unisex-adult. Brand Name: ?HJKB. Package Weight: ?0.71 Kilograms. Item Package Dimensions L x W x H: ?13.54 x 8.74 x 4.8 inches. Strap Type: ?Detachable. Valve Type: ?Float. Lens Type: ?Single Lens. Material: ?Silicone, Polycarbonate. Color: ?Black & Blue. Brand: ?HJKB.