12 Nights of sleepy time comfort. Lavender & rosemary vapors provide 8 hours of comfort per pad. For use with most brands of plug-in and waterless vaporizers and select Vicks inhalers, vaporizers and humidifiers. Non-medicated. See side panel for product listings. Vicks VapoPads Scent Pads work with heat to gradually release soothing aromatic vapors.