B-27+ Sun-Mate®/Sideshields from Safety Optical attenuate harmful UV rays up to 380 nanometers while enabling fashionable narrow frames to meet compliance issues. Sun-Mate® tint is exclusively for glare protection from the sun. Also available is the B-53 Sun-Mate Universal Sideshield, which provides impact and lateral glare protection for larger frames.Safety Optical Service, Lewisville, TX.