BOLD Thunderhead Performance Sunglasses – MTB, Ski & Lifestyle EyewearBOLD Thunderhead Fixed Color Performance Sunglasses Classic Style Meets Mountain Toughness Meet the BOLD Thunderhead, our classic square frame sunglasses with performance built in. Featuring fixed tint lenses and durable, lightweight frames, Thunderheads are ready for everything from singletrack to aprs ski, with an everyday silhouette that fits in just as well at a brewery or on the trail. Color Options: Red Black Frame with Red Lens Brown Frame with