Have a gym fanatic in your life? Save their workout with apair of these terrific headphones. The Sennheiser CX 680 Sports are great atstaying in while running.They’re a comfortable fit in the ear and are water/sweatproof,so they can be washed off on a sink when finished with a workout. The headphones, designed with help from Adidasfeature flexible “fins,” which help them wedge comfortably into the wearer’souter ear.The CX680s also get great sound, thanks in part to a deep bassresponse. At $120, they’re far from the cheapest pair of headphones one can buyfor the gym, but they are one of the best.