High Performance Filter Material: 3M™ Advanced Electret filter material helps wearers to breathe easily through the respirator for more comfortable protection 3M™ Cool Flow™ Valve: reduces heat build-up inside the respirator - even in hot and humid conditions M-Noseclip: The noseclip is quick and easy for wearers to mould around the nose offering greater comfort Cushion-Fit' Lining: The super-soft, cushioned inner lining helps improve wearer comfort Soft Waffle Edge: The flexible, textured edge offers a comfortable and secure fit Braided Headbands: Materials have been selected for extra comfort and durability. Robust Outer Shell: The shell construction offers users added durability Colour-coded headbands offer easy protection level identification - colour coded yellow: FFP1 (APF = 4) The super-soft, cushioned inner lining helps workers stay comfortable Braided headbands are coloured for easy identification: yellow for FFP1