SafetyTech International's PureAir Bio Response Kit is an easy-to-use, economical solution designed to protect first responders, infectious disease lab staff, EMS crews and others from biological hazards and particulate contamination. The system utilizes U.S. military-proven, lightweight motor blower technology and features loose-fitting head covers that can be worn with facial hair -- no fit testing required. A four D-cell battery pack is one of three unique battery configurations designed to make this unit versatile for any situation. A single, 8-hour disposable battery or NiMH rechargeable batteries are also offered.The system is compact and lightweight with quick and secure snap fit connections for the waist belt and hose. Hood or cape versions are also available.