Crews Prodigy SLX Blue Frame Clear Lens Safety Glasses. Weighs a mere 1.2 oz, but its tough, scratch-resistant, polycarbonate .58mm lens filters out 99.9% of harmful UV rays. Strong and flexible, these single lens style glasses, with side shields, provide a wide field of vision and angular coverage for added protection. Exclusive Duramass scratch-resistant coating. 1 Each.