The Pari Vortex MDI inhaler is not like other asthma puffers or spacers for inhalers. The Vortex is a much better asthma treatment device. Most MDI inhalers are made of plastic that causes inhaled medications to cling to the tube, thus reducing the amount of important medication delivered to the lungs. Pari Vortex has a non-electrostatic tube that offers much better performance.