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. Questions or comments? 1-800-Vapor-1-2 (1-800-827-6712). Works with these Other Vicks Brand Products: V750; V4600, V5100NS, V4450, V4500; V3500N, V3700, V3900; V150SGN, V106SGN; VUL520; V1800, V1900; V1750, V1700. Made in USA.