The chin strap for the Combination Cap was one of the uniform items that the United States Public Health Service Commissioned Corps revised in 2012.
Like its predecessor, the current chin strap is a half-inch wide, has a pair of slides for adjusting the strap’s length, and is secured to the cap frame with a pair of 22.5-ligne screw-on retaining buttons. But the new version incorporated a 1/16-inch-wide, maroon-colored horizontal band in the middle of the strap, and the old retaining buttons featuring an eagle clutching an anchor and surrounded by 13 stars were replaced by buttons embossed with the USPHS Corps device—an upright caduceus mounted at a 90-degree angle over a fouled anchor on a lined background.