Progressive Bluegrass is a subgenre of bluegrass music that incorporates elements from various musical styles, including jazz, rock, and folk. It often features innovative instrumentation and arrangements, moving beyond traditional bluegrass sounds while still maintaining the genre's acoustic roots. Artists in this genre frequently experiment with song structures and lyrical themes, appealing to a broader audience. Notable bands like Punch Brothers and Nickel Creek exemplify this modern approach, blending virtuosic musicianship with contemporary influences to create a fresh sound that attracts both traditional bluegrass fans and new listeners alike.