These 'on-the-ear' earphones are David's Formula's flagship design, an all-exclusive “Comfortable Wearing” technology. The clips: The R&D team of David’s Formula has devoted many years of effort into angle testing and calibration, and have successfully developed precision forged white steel clips which are flexible and patented. They form a perfect curve running down from the auricle, looping down to fit tightly and comfortably. Furthermore, they distribute the weight of the earphones evenly, offering additional comfort and a natural look with zero discomfort burden. A perfect demonstration of ergonomic design.