Shure has announced that its E4c sound isolating earphones have begun shipping to customers. Designed to match the iPod, the E4c earphones weigh just over an ounce and come with several tiny sleeves in various sizes for the best fit and sound isolation. They retail for $299.

“Adhering to the same quality standards that drove the success of its award-winning line, the E4c earphones further optimize the listening experience by utilizing Shure’s new High-Definition driver with Tuned-Port technology to significantly enhance bass response. The E4c’s comfortable sound isolating sleeves contour to the inner-ear, naturally sealing out more background noise than noise-canceling alternatives, and the small, portable, attractive design position them as a must-have accessory for today’s consumers.”