Do Heat and Moisture Exchange Mask Reduce EIB and Cough Severity in Asthma

A heat and moisture exchange mask will warm and humidify inspired air and therefore reduce airway heat and water loss during exercise. This will potentially reduce the incidence of and severity of EIB and may also have the potential to decrease the incidence of cough amongst athletes engaging in sports in cold dry environments

Same as the HME mask but active HME parts withdrawn from devices and multiple holes made in mouth piece to improve ventilation of mask and reduce HME ability of mask