The SD belt, also known as the sound dampening stealth unit, represented an advancement over the standard stealth belt. Its functionality relied on reducing all noises produced by the wearer, which made it more difficult to locate them. Although it was originally a Republic creation, the Czerka Corporation also made use of it. It was available for purchase from various merchants throughout the galaxy, typically costing around 200 credits.
Around 3951 BBY, Aratech Repulsor Company produced a version of this belt, which was sold by galactic vendors for a price of 300 credits.