SecureFit™ 400 protective eyewear in a convenient 3 pack of multi shaded lenses. See a clear difference in comfort, safety and fit. 3M™ SecureFit™ Safety Eyewear uses patented 3M™ Pressure Diffusion Technology for a secure, comfortable fit. The lightweight, flat temple, low profile design works seamlessly with hearing protection for a difference you can see and feel. Part of the 3M™ Pro Series Safety Products line that was designed for the way pros think, the way they shop and the way they work.