The Refill is the replaceable scented component for Niki. It contains una long-lasting molecule with essential oils and is alcohol-free. It neutralizes unwanted and unpleasant odors. Made from non-toxic EVA thermoplastic polymer. Una Once the fragrance dissipates, it can be replaced with any available scent. Compatible with all Niki models.| Top notes: Bergamot, fresh wood verde, cold spices. Heart notes: Tobacco flower, nutmeg anise, Sichuan pepper. Base notes: Cedarwood, guaiac wood, vanilla, amber.|| Secure using the functional clip on the car air vents.