Spiro is a speech valve with humidifier and heat exchanger, that combines several functions in one breathing aid.

Spiro is versatile, although it is meant to be used as a speech valve with filter, humidifier and heat exchanger, not all these facilities need necessarily be used at any one time. Spiro has provision for the connection of an oxygen supply, as well as, being light in weight and comfortable to wear.

Spiro incorporates a renewable filter; the filter housing is not discarded with the filter significantly reducing the cost of filters.