• Secure, in-ear design designed to contour to the inside of your ear
• The E2c's in ear design works like an earplug to block background noise naturally. This enables you to listen comfortably at lower volumes -- even in loud environments. And unlike bulky headphones utilizing active noise cancellation technology, no artifacts are introduced into your listening experience. Sound isolating earphones are also much smaller and don't require batteries.
• The E2c's speakers are constructed with studio-grade components, producing outstanding audio clarity that allows you to hear your music like never before
• Comes with 3 pairs of Foam Sleeves & Flex Sleeves, to ensure the ideal personalized fit - Because every ear is different, E2c Earphones come with three pairs (small, medium, large) of disposable Foam Sleeves, and three pairs (small, medium, large) of Flex Sleeves to ensure the ideal personalized fit
• The E2c's cables pass behind the ear - out of sight and out of the way -- to provide a more comfortable, discreet fit

The Shure E2c In-Ear Headphones combines a Dynamic MicroDriver speaker technology with a sound isolating design, to deliver rich, full-range sound while blocking outside noise. Originally developed for professional musicians, it allows you to listen comfortably at lower volumes -- even in loud environments. They're ideal for enhancing your listening experience with portable MP3, DVD/CD players and other audio sources. Dynamic MicroDriver speakers Impedance (at 1kHz) - 16 ohms Sensitivity (at 1kHz) - 105dB SPL/mW Color - Clear Connector - 3.5 mm gold-plated stereo plug Cable Length - 1.57m (62 inches) Weight - 30g (1 oz) Includes stylish, compact carrying case - The E2c comes with a stylish, compact carrying case. The cable spool inside provides a convenient, tangle-free way to store your earphones Shure USA Professional Grade Warranty Shure Sound Isolating Earphones are ideally suited for use with portable MP3, DVD, and CD players as well as any listening device with a 3.5 mm (1/8-inch) stereo jack. Plug them into your favorite listening device, or bring them with you when you fly. The result will be the same - an outstanding audio experience

I,ve been running with music since, well, when there was only tape. I've tried many in ear phones but was never happy: either poor sound quality or bad fit or both. Recently I tried the new Bose in-ear phones and was pleased with the sound quality but never could get them to fit. They were sort of OK until I started to sweat. The Shure E2C has been the best in-ear phones that I have EVER had. Sound quality is great. They go well into the ear canal so the volume doesn't have to be too loud thereby saving battery for longer runs. The fit options are the broadest available by anyone. One of my ear openings is small, the other large. With the foam covers I have no problems. Usually running in the heat will have other earphones slip out. Not the Shure. It does take a bit of relearning to get them in. The cord could be more flexible. But, once these babies are in, they don't move.