BOLD Flash Photochromic Sunglasses – MTB, Ski & Lifestyle EyewearBOLD Flash Photochromic Sunglasses Light Adaptive Performance Eyewear Lightning fast transitions, zero lens swaps. The BOLD Flash sunglasses are designed to keep up with changing light conditions and changing terrain all in a sleek, performance first frame. With a modern semi wrap shape and light adaptive photochromic lenses, Flash adjusts automatically from clear to tinted as the sun comes out or the trail dips into shade. Perfect for mountain