For $70, the CX685 provide exceptional sound quality. The in-ear design creates an acoustically closed environment, ideal for a busy gym when you need to focus on your program. The small adjustable ear fin design hooks comfortably under the contour of the outer ear to keep a comfy fit, and the sound even and clear. In-line volume control allows for on-the-fly adjustment. Sennheiser was a head above the competition in terms of overall performance and price.