The CX 680 in-ear headphones from Sennheiser and adidas provide high-quality audio, noise isolation, and durability in a compact and lightweight design. Ideal for the sports or workout enthusiast, the headphones have a sweatproof design for indoor or outdoor use at any time of year. The headphones have an exclusive EarFin design and multiple sizes of eartips to ensure a comfortable, stable fit that won't fall out. The in-ear design also blocks up to 20dB of ambient noise, letting you focus on your workout instead of your environment.
The headphone cable is reinforced with DuPont Kevlar for terrific durability and flexibility, even in extreme weather. A detachable extension is included for extra slack, and a clothing clip helps to minimize tangles. The cable has an integrated volume control for making quick adjustments, and the standard 3.5mm plug provides compatibility with a wide variety of devices, including the adidas miCoach and all other CD players and MP3 players.