Sherwood Onyx ARL Black Silicone MasksAnti Reflective Lenses (ARL) Building upon the success of our best selling Onyx mask, we've elevated the experience by upgrading the lenses with Anti Reflective Coating (ARL). These cutting edge ARL lenses, starting as Sherwood Crystal Clear lenses, undergo a meticulous process to minimize light reflection. By reducing light reflection, more light is able to reach the diver's eyes, resulting in enhanced contrast and optical clarity. While typical