Vicks Scent Pad Replacements provide up to eight hours of soothing menthol vapors. The package contains six pads that are compatible with some Vicks vaporizers, plug-ins and humidifiers. These Vicks pads are inserted in the machine you use and fill the entire room with a soothing aroma and vapors that help alleviate your cold symptoms and help you get the good night's sleep you need when you're sick.