3M  Model 6502QL/49490 Medium Rugged Comfort Quick Latch Half Facepiece Reusable Respirator features quick latch mechanism that makes it Easy to drop down the respirator from face without removing head straps and resilient silicone faceseal that provides comfort, durability and stability with a soft but firm seal. Respirator includes low profile half facepiece design offers a wider field of view and exhalation valve cover with proprietary 3M cool flow valve that helps to reduce heat and moisture. It is ideal for assembly, cleaning, demolition, facility maintenance, grinding, machine operations, sanding and welding.