3M 7000128237 is a half facepiece reusable mask designed to protect against mold and silica hazards. It is not compatible with 3M PAPR or Supplied Air Systems, but it does offer enhanced comfort with its silicone faceseal and cool Flow™ exhalation valve. The mask features a bayonet connection for easy attachment to a compatible welding shield and has a drop-down feature for added convenience. It provides gas and vapor protection for hydrogen fluoride, mercury vapor, chlorine, organic vapor, acid gas, ammonia, methylamine, and formaldehyde. This lightweight mask weighs 0.37 lb. and is available in a small size. It comes with a 4 point quick latch harness and has an assigned protection factor of 10. Spare parts are included, and the mask is made from silicone and nylon materials for enhanced durability.