There are few things more frustrating than your earphones slipping out in the midst of getting your groove on. A solid fit is imperative to getting the most of in-ear monitors and with Revols Custom-Fit Earphones, a good listening experience is now within reach. The earphones, created in a partnership with Onkyo, use a tip that molds to your ear’s unique shape in 60 seconds. With a rechargeable battery good for 8 hours, Revols Custom-Fit Earphones also connects to Bluetooth for added convenience.