For use only with SudaCare Advanced Vapor-Plug. Gentle care when you're under the weather. 40 Hours of use. Eucalyptus, menthol & camphor vapors. 1 40 Hour advanced vapor-plug refill unit. Non-medicated. Feeling under the weather during cold or allergy season? Non-medicated SudaCare Advanced Vapor-Plug unit releases a unique blend of Eucalyptus, menthol and camphor vapors to give you hours of gentle care while you rest. Retreat, renew, and reemerge with the gentle care of non-medicated SudaCare. Made in Mexico.