Westone TrueFit Technology50+ years experience with inear applications has yielded a low profile, lightweight, universal earpiece which delivers maximum comfort and inear coupling for dynamic transfer of sound. Balanced ArmatureWestone's balanced armature drivers are significantly more compact and efficient than traditional dynamic drivers. By combining multiple balanced armature drivers with sophisticated crossover networks, Westone monitors provide enhanced sonic detail and frequency range that extends well beyond typical inear solutions. EPIC Replaceable CableConstructed of bifurcated, highflex, ultralow resistance tensile wire, reinforced with a special aramid fiber, Westone's offer the most robust fully replaceable cable there is. This EPIC cable is braided for the ultimate durability, acoustic purity, and isolation from mechanical cable noise. By incorporating a replaceable audiophile connector the cable is easy and convenient for the user to remove and replace as their need arises. Designed Assembled in the USACrafted in the United States, the artisans and lab technicians at Westone exhibit a level of meticulous care that showcases the passion and history for America's handmade products.