Frame: anticrash polycarbonate - Color: mat black - These sunglasses adapt to changes in light thanks to their photochromic lenses. Photochromic and Polarized Yellow and Grey LENS: photochromic to darken and lighten depending on the available sunlight and polarized to block blinding glare, from dark early morning starts to bright midday sun, to the long shadows of late afternoon. The yellow polarized lens is the one defined as the high definition lens par excellence, ideal for driving and sports activities that require an increase in contrast in conditions of low light, rain, fog, etc. Included a Removable Optical Insert for ophthalmic lenses - any strength friendly - Your optician can easily assemble your optical lenses to the clip - The inside of the front frame is covered by a removable windproof soft foam for a comfortable fitting. Adjustable nose-pad is comfortable and offer an exceptional fit for any shape of face. This system can also be used to adjust the sunglasses height and the distance from the face to prevent fogging up and misting - Interchangeables temples with elastic strap to have a very skin tight fitting for motorcycle and extreme sports. Perfect for motorcycle, Skydiving, Extreme Sports - Wraparound design: protects the eyes from wind and bad weather, provide enhanced peripheral vision. The lens meets drop ball anticrash test.