The POC Fovea Mid Clarity Photochromic provides optimal vision in a wider range of light conditions thanks to a Clarity Photochromic lens. Photochromic means that the lens adapts to outside light conditions. Is the sun shining? Then the lens darkens. Does it get cloudy? Then the lens becomes brighter. This way your vision is good in every circumstance and you only need one lens! Furthermore, the POC Fovea Mid Clarity Photochromic has a large field of view for even better vision and the goggle is equipped with triple face foam and a flexible frame for an optimal fit for almost all face shapes!