Amazon.com: Sennheiser MX 680 Sports Earbud Headphone with Volume control & Earfin Clips (Discontinued by Manufacturer) : Electronics
Sennheiser OMX 680i Sports Review: Sennheiser and Adidas have collaborated to produce a quality pair of sports headphones - Headphones - Portable Headphones - Good Gear Guide
Sennheiser CX680 Canal Adidas inspired Sport Earphone - Newegg.com