Code Red Silicone Semi-custom Ear Mold - 10 Pack . Made from hypoallergenic black silicone plastic. This silicone semi-custom ear mold is comfortable enough to be worn for extended periods of time. Contoured to fit your ear for a snug fit and stays in place even with aggressive head movement. This ear mold allows the user to hear ambient noises. When comfort and safety are important this is a must have Package Contents: Code Red Silicone Semi-custom Ear Mold - 10 Pack