CETATEK aqua bionic twin clear 4mm tempered glass lens framed mask with a low volume design provides a great field of vision for your diving experience. The high quality medical grade silicone skirt and strap with patented one hand adjustment buckles that are built with a silicone spring offers a lighter more comfortable fit. Both mask skirt colors limit distracting reflective light on the faceplate; the white skirt offers a bright feeling that helps to minimize claustrophobia that some divers experience with an all black mask. The mask is available in two colors and two sizes to fit a wide range of heads.