This underwater respirators fits the human face and has a scientific respiratory system to help you enjoy the beautiful underwater scenery.<br/>Features:，One way (external) circulation respiratory separation system: it can take in air from the breathing tube and take out air from the nose and mouth place.，180 ° panoramic view: 180 ° panoramic high-definition view, no dizziness, so that you can get a nice viewing experience in the underwater world.，Floatings ball structure: falling on the water to inhale air; floatings under the water to prevents water.，Large air intake: compared with the traditional style, it has larger air intake and can keep breathing smooth.，Anti-fog structure: optimize the edges of the air isolation bin, conform to the ergonomic design, more fit the face, prevents air leakage, prevents fog.，Camera bracket: there is a camera bracket on the tops of the heads, which can record the sight of the tours and leave a nice memory.，Adjustable headband: flexible and comfortable, suitable for different kinds of people.<br/>Specifications:，Material: ABS &#43; silica gel，Color: all black, white / blue, black / blue, white / pink (optional)，Size: S/M, L/XL (optional)，Fit size:，S/M: suitable for the distance from the most concave part of the bridges of nose to the chin: 100 ~ 120mm，L/XL: suitable for the distance from the most concave part of the bridges of nose to the chin: more than 120mm，Item weight: 500g / 1.1lb，Package size: 210 * 275 * 140mm / 8.3 * 10.8 * 5.5in，Package weight: 650g / 1.4lb<br/>1 * Snorkeling Ma-sk，