Designed and built for voice clarity The vast majority of high quality earbuds are built for music and have enhanced bass response. Our CC Buds-Pro have high quality materials but are designed for voice clarity. This allows voices to come through with better legibility. They have accurate bass that’s similar to studio monitor type bass response, which is precise, but not booming. Six different earbud covers are provided for custom comfort. Included are three sets of small, medium and large covers in comfortably soft silicone and the same three sizes in compressible foam. The foam covers provide enhanced bass and noise isolation. You select the best fitting covers for your ear because everyone’s ears are different. Regardless of what earbuds you own, it is recommended that you replace the earbud covers annually or whenever you notice wear and tear, to prevent pieces from going inside your ear canal.