- Superior sound quality - Eco-friendly, lead-free electronics - Four-foot braided fabric cord - Compatible with any device with a standard 3.5 mm audio jack - Speakers are fully adjustable to suit your unique head shape - All RunPhones are backed by a one-year guarantee - One Size fits Most RunPhones headphones are the worlds most secure headphones for running and exercising. The products innovative, over the ear design features ultra-slim headphones embedded inside of a sporty, moisture-wicking, machine-washable headband. Ambient noise filters through the band, allowing you to stay in tune with your surroundings. Unlike ear buds, RunPhones stay put, letting you focus on your workout, not on managing your headphones. Simply plug in and rock out to your favorite music.