3M Cool flow Pro Series, Valve Respirators. CONTRACTOR PACK, pack of x10 -Painting Sanding, etc. -Model 8511, N95 *Brand New In Box. Sealed in Shipping Bag. (Purchased for my partner but he didn't need) *3M Respirator 8511 is part of the pro series line of face masks. Built with pro workers in mind, this valved respirator reduces heat buildup inside of the respirator, helping to enhance comfort during long-term use. *This respirator also features advanced electrostatic media that enhances the capture of airborne particles while allowing you to breathe easier. -Proprietary advanced electrostatically charged filter media helps ensure easier breathing -Soft interior foam rests on the bridge of the nose for comfort -Features stretchable headbands for easy application -Adjustable nose clip to help ensure a secure, custom seal -Convenient and lightweight (The last 2 photos are the sealed new box that would be provided upon purchase. Box is still sealed and Brand new from shipping) *Only $5 or Best offer. Delivery can also be arranged.