The Bobster Gunner Convertible Sunglasses Black Frame Photochromic/Clear Lenses merges fashion with functionality by combining the most desired aspects and features of any eyewear available. The wrap-around Grilamid TR90 frame can be worn either with smooth temples as a sunglass or with a detachable, adjustable strap as a goggle, and it also comes with a clear set of lenses. Vented removable closed cell foam prevents lens fogging and keeps wind and debris from distorting vision, and the photochromic lenses change with altering light to allow for greater clarity and for the night.