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 new MDR-EX51LP 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 MDR-EX51LP.