The 3M Aura 9322+ FFP2 valved respirators are the usual 3M high quality, providing great protection when exposed to unwanted dust particles and non-volatile liquid particles. The unique Cool Flow valve means the 3M Aura 9322 is perfect for use work in hot and humid conditions. 3M have built up the reputation as the market leader in disposable respirator masks, they''ve managed to find the perfect balance between comfort, style and performance. These dust masks do not provide suitable protection against harmful gases.