Sony's first closed-type Fontopia design reduces outside noise for high-intensity listening, helping to generate powerful, resonant bass response. So exercise, dance, or skate with the Fontopia Headphones. Featuring a Super-light in-the-ear Design for a snug, comfortable fit inside the ear - eliminating the headband, Super-small 9 mm Drivers, and Soft, Silicon Earbuds, these headphones were created to enhance your on-the-go listening. Two sizes of earbuds are also included. So move to your music with the Fontopia Headphones.