MSA's OptimAir TL PAPR incorporates a sleek, low-profile design for user comfort never before offered in a PAPR. All components, including the motor blower, cartridges, and battery, are packaged in a single hip-jugging housing. Improved motor blower electronics allow for optimum air flow, while the compact and ergonomic battery pack affords lightweight comfort and fit. Flow control sensors are activated by insertion of the cartridges and breathing hose to the blower housing. The unit automatically adjusts for altitude via an internal pressure sensor. Superior design features permit fast, accurate changeout of cartridges, hoods and batteries. Slim, curved PAPR housing helps to minimize fatigue and permits work in tight confined area.