The 3M Rugged Comfort 6500 Series Half Facepiece Reusable Respirator helps provide respiratory protection in harsh, dirty environments against airborne contaminants when used with approved 3M cartridges and filters. This facepiece is designed to help promote comfort, durability, and stability with a firm, lightly textured silicone faceseal and strong body construction. When properly fitted and used with approved 3M cartridges and filters, this respirator helps provide respiratory protection at concentrations up to 10 times the Permissible Exposure Limit (PEL). While being the lightest silicone 3M facepiece, it is still rugged enough to withstand long hours and extreme conditions. The resilient silicone faceseal offers an extended facepiece life, even keeping its shape in high-heat environments. Not certified for medical use.