XTS is a full frame design safety glass that adapts to the changing needs in field use. It has passed the US Military Vo Ballistic test requirement for impact velocity, at 640 feet per second, 4 times the standard set by ANSI Z87 for safety glasses. Refer to the photo showing a comparison of impacts at Vo and ANSI Z87 test speeds. XTS combines an exceptional fit and coverage with a great looking style. The innovation its combination of safety, style, comfort, at an affordable price, under $10 each for a wide selection of lenses. Other XTS features include: The full frame design has a soft rubber nose bridge and soft and stylish rubber temple tips. The lenses offer 99.0% UV protection and meets ANSI Z87, in its dual lens, anti scratch resistant design.