ZerostatVT spacer is a unique static free transparent spacer with a valve mechanism which increases the drug fraction reaching the lungs. It is both a spacer (extends the space between the inhaler and the mouth) as well as a holding chamber (acts as a reservoir where the actuated aerosol cloud can be held prior to inhalation). It has all the features which a spacer should ideally have i.e., static free, transparent, flow gate valve, shape of an aerosol plume and volume 250-300 ml. Transparent ZerostatVT spacer is designed to provide visual confirmation that the dose is delivered. ZerostatVT spacer ensures that patient receives a high and consistent quantity of medication dose after dose. The time available for inhalation is prolonged by using polyamide, which is a static free material. Unidirectional flow from the holding chamber is achieved by using a one-way valve.