The L'Oreal brand's campaign provides the public with an opportunity to experience first hand the scent of Garnier's fruity fragrance on buses in Hong Kong, according to Peter Oesch of Publicis Ad-Link, which created the campaign.
The campaign includes outdoor, television and print advertising.
Television commercials featuring Garnier Nutrisse hair colouring will also be aired on buses, along with interactive games and a lucky draw.
"Garnier is a top brand in Europe for natural beauty products, but here in Hong Kong there is only one product line available, which is the Nutrisse hair colouring with natural ingredients, said Oesch.
He added that other product lines under the Garnier brand were in the pipeline for roll out by the end of this year.
Paul Wong, marketing manager at L'Oreal Hong Kong, added: "The style is friendly, warm and direct. We started with bus sampling of Nutrisse on the streets last year and the scented bus campaign is a second wave of our outdoor events."