Parliament is one of few brands of cigarettes on the mainstream market to feature a recessed paper filter. Cigarette filters became common in most cigarettes in the 1950s. In the 1940s and 1950s, the brand was marketed for its unique filters, with advertisements reading, "Only the flavor touches your lips", and "Tobacco tastes best when the filter's recessed". The brand also claimed that the recessed filter prevented tar from making contact with the smoker's mouth, unlike standard filters.
The Philip Morris company founded a solid and successful Parliament brand in 1931. The first cigarettes with the sonorous name Parliament were equipped with a unique charcoal filter made of ordinary cotton fabric. Later it was replaced by a dense paper filter, half hollow as a mouthpiece. This innovation in cigarette manufacturing technology contributed to the cooling of tobacco smoke and this particular softness of taste.