The 3M SF203AS/AF Safety Spectacles with a yellow lens are designed for optimal comfort and visibility. They are self-adjusting, and designed for Class 1 protection against flying particles, dust, and small debris. The lenses are made of high-grade polycarbonate, and are impact-resistant and scratch-resistant. The flexible frame allows for a personalized fit, and the adjustable soft rubber nose pads provide added comfort. The frames also have side protection for optimal eye protection. The self-adjusting lens creates a secure fit while providing an unobstructed field of view. The included ultra-soft cleaning cloth ensures maintenance of the highest quality lenses, so you can wear them with confidence and enjoy the superior protection they offer.