The Martin HD-28 Standard Dreadnought Acoustic is the re-creation of Martin's legendary herringbone style guitars. It has a Sitka spruce top, solid rosewood back and sides, and mahogany neck with ebony fingerboard. The Vintage that this guitar boasts includes a herringbone top trim, a traditional zigzag backstrip, and Martin's famous scalloped X-bracing that allows the top to vibrate more freely, yielding a louder, more open tone.