L&M Blue Box is a filtered cigarette brand manufactured by Philip Morris International and sold domestically by Altria. L&M (Liggett & Myers) is one of the world's best-selling cigarette brands, originally launched in 1885 and relaunched as a filtered cigarette in the early 1950s. The Blue designation replaced the former "Lights" label following FDA regulations banning flavor descriptors such as "light" and "mild" for tobacco products.

L&M Blue Box cigarettes are sold in a standard flip-top hard box format containing 20 cigarettes per pack. The blend features a cellulose acetate filter and uses a blended tobacco mixture with additional ingredients including molasses. L&M Blue is positioned as a milder-smoking option within the L&M lineup, comparable to other brands' "light" or "silver" tier products.