Oxymizer employs oxygen conserving reservoir design that saves oxygen normally wasted during exhalation. Test have shown that pilots using the Oxymizer need only .75 liter/min at 18000 ft to obtain over 95% of O2 saturation in the blood. As a result, oxymizer devices can provide a savings in O2 usage of up to 75%, depending on flow rate. Available in 2 styles: Original design with the reservoir in a face piece or the Pendant with the reservoir in a chest pendant.