ProChoice Dust Masks Promesh P2+Valve / 3 Pack 

Flexible mesh which ensures optimum shape retention for a perfect, airtight fit during long periods of wear,P2 rating protects against mechanically and thermally generated particles,Moulded nose piece for close fit,QuickLock straps for easy fit and release,ProValve for increased exhalation efficiency and comfort – reduces heat build up under mask,Resealable poly bag ensuring masks remain hygienically stored