Sennheiser OMX 680 Sports in-Ear Headphones - Gray/Yellow (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90 day warranty Ear sleeves have been replaced and are brand new Eafin holding system provides a secure fit during workouts. Sweat and water resistant High-output drivers for energizing sound DuPont Kevlar reinforced cable for unmatched sound