The Science: The ColdAvenger design and function is based on established science which documents the adverse effects of cold exposure on the face and airway, and the mitigation of those adverse effects. Our patented design offers multi-functional protection for cold operations and survival. Independent testing within a cold chamber has shown the ColdAvenger will transform -72F air outside the ventilator to an average of 59F air inside the ventilator.Normally we offer a no-questions-asked, 60 day return window. However for the safety of our customers and employees, we are not accepting returns during the COVID-19 outbreak. COVID-19 Statement: ColdAvenger Masks will NOT provide protection against dust, debris, particulates or viruses.