MSA Medium OptimAir  Black Hycar Rubber Mask-Mounted PAPR Assembly with Advantage  4100 facepeice is ideal for use within hazardous particulate environments including asbestos, lead abatement, nuclear and mold remediation applications. Water-resistant HEPA filter for protection against particulate contaminants and it has sealed, water-resistant battery fits inside most pockets. Dual-rate charger recharges fully discharged battery in less than 3 hrs. It features lightweight and compact design for long-life, high-performance and low maintenance. It includes rubber head harness, motor, NiMH battery, charger, cable, HE filter cartridge and waist belt.