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 underwater world clearly. Features: When inhaled, air enters directly from both sides and does not stay in field of vision. When exhaling, exhaust gases is discharged from exhaust valve in middle to prevents generations of fog. Equipped with lenses, users can enjoy underwater scenery more clearly. Anti fog film design, can be up to 15000 hours of anti fog effect, no fog obstruct line of sight. Waterproof system, floatings bead design, prevents seawater from entering breathing tube. 3D fit, tight waterproof, fit face. Multifunctional camera frame design, detachable camera frame, convenient to use, record 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 / (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