CordCruncher Tangle-Free Adjustable Bass in-Ear Headphones by Mel B, Poppin Pink Cord crunchers expand from 16- 40, and every size in between Patented adjustable bass, you can change your bass depending on your mood Advanced Acoustic technology for incredible sound Wrap your cord cruncher around your wrist or neck for storage on the go The tangle free sleeve is Made of Medical grade Natural USA latex rubber Connectivity technology: wired