Evans 22 inch Calftone Bass Drum Head BD22CT Calftone drumheads are a synthetic alternative to traditional calfskin. These heads embody the calfskin look and sound but with the consistency, fit, and tuning range made standard with Level 360 Technology. Calftone is made using a blend of unique materials to produce warm, full, and rich tones. These heads bring out the best of a vintage kit and evoke a classic appearance and sound from modern drums.