PCI Race Radios Challenger Semi Custom Speakers The Semi-Custom Molds earpieces are an advanced version of the Challenger II Foam models. They boast an ergonomic design that snuggly fits into the ear, ensuring enhanced noise reduction. Their comfort is not dependent on the tension in the ear canal, providing users with a conveniently comfortable experience. Features: 28db ambient noise reduction 18 inch heavy duty cord Switchcraft mono jack Soft, semi-custom molds Includes zipper carrying case