Drummers who swear by calfskin heads for jazz and classic rock have another option in the Evans '56 Calftone series. These synthetic drumheads have the look, feel, and sound of real calfskin, yet they offer the modern innovations Evans is known for - Level 360 collars for better seating on bearing edges and weather resistance for a stabler tone. And at just 7-mil thick, Evans '56 Calftone heads are more sensitive than even the thinnest hide heads.