Traditional cup shape, with nose clip and twin strap design The convex shape, twin strap design, nose foam and nose clip ensure comfortable wear over a range of face sizes 3M Cool Flow Valve: Effective removal of heat build up provides a cooler and more comfortable wear, Removes exhaled air and minimises the risk of misting eyewear Reliable, effective protection against fine particles. Colour coded straps, blue = FFP2 (APF 10) Some of the range feature the 3M Cool Flow Valve to help reduce heat build-up Headbands are colour-coded for quick and easy identification, yellow for FFP1, blue for FFP2 and red for FFP3 Designed to work well with 3M Eyewear and Hearing Protection products