This kind of snorkeling mask can breathe freely with double tubes. It is water-proof and has a wide view. It can help users to explore the underwater world clearly. Features: When inhaled, the air enters directly from both sides and does not stay in the field of vision. When exhaling, the exhaust gases is discharged from the exhaust valve in the middle to prevents the generations of fog. Equipped with lenses, users can enjoy the underwater scenery more clearly. Anti fog film design, can be up to 15000 hours of anti fog effect, no fog obstruct the line of sight. Waterproof system, floatings bead design, prevents seawater from entering the breathing tube. 3D fit, tight waterproof, fit face. Multifunctional camera frame design, detachable camera frame, convenient to use, record the nice underwater scenery. Widened elastic braided mirror belt, freely adjustable and comfortable. Double breathing tube design, make oxygen flows faster and breathe more smoothly. A variety of colors to choose from, beautiful and generous. Specifications: Material: PC+Silicone Color: black / black, black / blue, white / blue, white / pink (optional) Size: S / M adults small, L / XL adults large (optional) Item size: 240 * 180 * 100mm / 9.4 * 7.1 * 3.9in Length of respiratory tube: 400mm / 15.7in Item weight: 680g / 1.5lb Package size: 280 * 210 * 120mm / 11.0 * 8.3 * 4.7in Package weight: 715g / 1.6lb Packing List: 1 * Snorkeling Mask