The B21 is all about consistent contact and smooth turf interaction which are products of a shallower face, progressive lengths, and the expected oversized shape that is synonymous with the Big Bertha name.
High Ball Speeds From Flash Face SS21 + the Jailbreak Callaway's advanced A.I. designed promotes fast ball speeds across an expansive area of the face, while the Jailbreak bars increase stiffness and promote even more speed.
