The Sennheiser PMX 686 SPORTS headphones will remain securely in place, whether you’re running up a hill or sprinting to the finish line. The classic earbud style provides clean sound and allows you to hear outside noise which is ideal for use when running/riding in traffic. Also the behind-the-head fit keeps them secure and won't put any pressure on the top of the head like many other headphones. The PMX 686 is sweat/water resistant will stand up to nearly any activity. Full controls for Apple/Android devices and a 2 year warranty of protection from Sennheiser.