Koss IL100 Earbuds and In-Ear Headphones - Black are interlocking in-ear headphones and feature a truly original design coupled with a unique material to form a perfect harmony. The interlocking in-ear headphones utilises an ingenious patented design for easy on-the-go storage without sacrificing richly delivered audio delivered through performance tuned 9 mm drivers.The frame of the Koss IL100 interlocking in-ear headphones is constructed from highly polished metal and surrounded by flexible, soft-touch material. This innovative material doubles as a soundproofing coat, intended to deaden any unwanted distractions, allowing the listener