From the makers of Sudafed Nasal Decongestant. Comforting care when you are congested. Continuous 8-hour release. Contains: 1 Vapor-Plug & 5 refill pads. Menthol and eucalyptus vapors soothe you while you sleep. Easy-to-replace refill pads last up to 8 hours. Convenient and simple to use - just plug in! Contains a blend of aromatic ingredients including menthol and eucalyptus. Vapor-Plug made in U.K.