The Westone ES60 is the ultimate custom in-ear monitor, handcrafted with six balanced armature drivers in each earphone and a multistage crossover design that yields unrivaled sonic purity. The ES60 represents the culmination of everything we’ve learned about in-ear monitor technology since we brought our first custom monitors to market in 1996. Designed for the professional musician or music enthusiast, the Westone proprietary flex-canal gives the user the most comfortable in-ear monitor on the market today.