Featuring innovative photochromic lenses from Transitions Optical the Oakley Half Jacket with Transitions Lens lightens and darkens automatically depending on the ambient light. This technology along with base colors that improve contrast and depth perception provide the ultimate building blocks for superior visual clarity in wide ranging conditions. These amazing lenses also block all UVA UVB and UVC rays in addition to offering distortion-free clarity even when peering through the furthest corner of the lenses.