The 180's Exolite Sonic Audio Ear Warmer keep you warm and connected with a combination of protection and technology. These ear warmers have built in headphones that are great for winter activities like running and skiing. The patented behind-the-head design uses a sleek frame that collapses for easy storage. Quantum Heat fabric wicks moisture and captures body heat to keep you dry and warm. Removable QuantumSound speakers provide excellent sound to pump your tunes. Can be used with Helmets, hats and glasses.