BZ Optics PHO Photochromic Bifocal Mountaineering • Interchangeable lenses to optimize

• Interchangeable lenses to optimize performance in any environment

» Gun Metal wire frame with Clear TR90 temples with Blue rubber grips

» 100 percent UVA/UVB protection

Not suitable for Progressive PD under 33

BZ Optics PHO Photochromic Bifocal Mountaineering • Interchangeable lenses to optimizeBZ OPTICS PHO Frames with Photochromic Bifocal Lens. Features. Lightweight flexible frame with dual moulded non slip temples. Adjustable non slip nose piece for comfort and fit, ideal for a wide range of face shapes and sizes. Comes with a hard case and microfiber cleaning cloth. Lenses. Lenses change colour from Clear in Low Light to Grey Cat2 in strong UV sunlight. These are ideal for anyone who normally needs reading glasses to be able to read