Internal anti -fog coating process. Close -up of the , comfortable and fit, not easy to leak. Adjustable bands can adapt to multiple size circumference. Quickly adjust the zone, humanized adjustment buckle, which can easily adjust the length and comfort of the . Especially thickened band, the zone has good stretching. include: 1*Swimming Panoramic & Super Clear View-A wide 180-degree view gives you a clear and long-range view of swimming underwater. With the multi-coating protective lenses, you get no vertigo or glare experience during outdoor swimming time. Note: this model might be too big for some small children. Please be sure to measure the child's before purchasing.