Provides respiratory protection against fine dusts. 3M™ Cool Flow™ valve reduces heat build-up to offer comfortable protection, particularly in hot and humid conditions. Durable collapse-resistant inner shell. Good fit over a wide range of face sizes provided by convex shape, nose clip and twin strap. Comfortable, light weight off-the-face design and double strap. Conforms to EN149:2001 + A1:2009 FFP1 NR D standard.