4-cell refill membrane for Vaportek-Breasy and Maxi. All products of the VAPORTEK ODOR CONTROL SYSTEMS employ a proprietary compound of 52 selected natural oils, calles NEUTROX GAMMA, hermetically sealed into a membrane formed from a patented fibermaterial that permits NEUTROX GAMMA to ''breathe'' through the surface of the membrane as a vapor. Convection carries the vapor very quickly anywhere the air is allowed to circulate. VAPORTEK''s compound is an odor neutralizer. It modifies the olfactory nature of unwanted odors to a point of odor disappearance. When two substances of given concentrations are mixed, the resulting odor maybe far less intense than that of seperate components and not be perceptible. This is the principle behind odor modification, or neutralization and the basis of VAPORTEK''s odor neutralizing products. During the first days of use the own scent of NEUTROX GAMMA is noticeable. This is quite normal and will reduce after 3-5 days. The important thing is to smell nothing, neither NEUTROX GAMMA nor the malodors. As soon as NEUTROX GAMMA is perceived you adjust it lower. The liquefied active substance, NEUTROX GAMMA is heavier than normal air. For a perfect result. The product must have the possibility to fall so that the used units must be located at an altitude of at least 6 feet. Please avoid the direct contact between the active substance and your things like wood furnitures, fabric, carpeting and different plastics.