The drumhead low tones to resonate freely. There is replaceable Skyndeep® graphic drumhead with Ultratac. This new development in Remo’s drumhead technologies offers enhanced sound with an attractive look. The Skyndeep with Ultratac adds a unique animal-like texture on the drumhead surface that produces low bass notes while adding pliability, making it easy to bend and modulate the pitch. Also featured on this drumhead is Remo’s O ring with adhesive that reduces overtones and increases warm bass tones