Progressive Sludge

Progressive sludge is a subgenre of heavy metal that combines elements of progressive rock, sludge metal, and doom metal. It is characterized by its slow, heavy riffs and complex song structures, often featuring odd time signatures and unexpected tempo changes. The music is often dark and brooding, with lyrics that deal with themes of despair, isolation, and existential dread. Bands like Mastodon, Baroness, and Neurosis are considered leaders of the genre.