With the Crossover we have expanded the Marine Band series to introduce a new, top-of-the-line professional quality instrument for the discerning player in modern blues, rock, jazz, soul or funk. The Marine Band Crossover Harmonica's revolutionary laminated-bamboo comb is completely sealed, making it water repellent and exceptionally stable. In combination with the screw-together assembly, the Marine Band Crossover is extremely airtight, with fast, even response and a raspy, powerful sound that's exceptionally well-suited to amplified playing as well as acoustic styles.