High Performance Filter Material: 3Mâ„¢ Advanced Electret filter material helps wearers to breathe easily through the respirator for more comfortable protection. 3Mâ„¢ Cool Flowâ„¢ 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: blue for FFP2.