Gym-friendly earphones have typically been referred to as such because they either stay firmly in place or endure physical abuse without immediately dying. And in the past, Sennheiser has made respectable earbuds for exercise, but a new partnership with Adidas takes workout listening to a new level.
Excellent audio performance with strong bass response; Comfortable fit; Stays in place even during intense workouts; Waterproof, sweat-proof.
Some cable thump when running; Neon yellow color won't appeal to everyone.