Check the listing for details. RZ Mask FILTER, F1 Standard + Active Carbon Filters (Medium) 3-pack. Color: Gray, Condition: New. Listed at 9.99 USD. Protect yourself from harmful airborne particles with the RZ Mask FILTER, F1 Standard + Active Carbon Filters (Medium) 3-pack. Designed for adults, this respiratory protection tool is perfect for those who work in construction, woodworking, and other similar industries. The filters have been tested and proven to block out harmful particles, making it a reliable tool for keeping yourself safe on the job. The RZ Mask FILTER, F1 Standard + Active Carbon Filters (Medium) 3-pack is made by a trusted brand, RZ Mask, and is perfect for those who need to be protected from airborne particles. The tool is perfect for those who work in dusty or dirty environments and provides reliable protection against harmful particles. The filters are easy to install and use, and the tool is designed to be comfortable to wear for extended periods of time. Whether you're a professional or a DIY enthusiast, the RZ Mask FILTER, F1 Standard + Active Carbon Filters (Medium) 3-pack is a must-have tool to keep yourself safe.