 CES 2015 featured some jaw-dropping innovations, like self-driving cars and 8k televisions, but some of the bigger innovations came in small packages, like headphones. Hi, I'm work for a cruising sheet and we have two headphones here. We have our regular sleep phones, which is a fleece fabric, and it has speakers embedded in the sides. And then we have a rent phone, which is more of a moisture wicking, with the same basic idea of a headband with speakers inside. The whole idea is comfort, you don't have the earbud saying, like, you've heard when you go on your side or they don't fall out when you're running. Acoustic Sheep was a CES honoree for their Bluetooth sleep phones, which can power up through induction charging. Another set of headphones with a twist, the free wave sport fitness headphones combine wireless sound with the fitness wearable. I have a wireless full-suck symmetry. It's a fancy way of saying that we can check the quality of your fitness, your oxygen level, and your blood flow level, your heart rate wirelessly. Notice that these independent devices have no wire. You get true stereo with no band in between. Here at CES, we saw all kinds of audio devices, from portable speakers to 3D sound to simple headphones CES 2015 had it all. Reporting from Las Vegas, I'm Rachel McCuffin.