Opened but unused. No pets or smokers. EPM SMARTPHONE ATTACHMENT SYSTEM Ver. 4.0 Introducing the ultimate smartphone strap holder, as envisioned by Yosemite Strap. In collaboration with YKK Corporation, we have developed a strap holder with a thickness of only about 0.5mm, made by integral molding (injection molding) using a special grade of nylon. This thinness reduces the feeling of bulk when attached to a smartphone case. Furthermore, the stepped design on the contact surface with the smartphone charging port allows for smooth power supply. Compared to metal holders, it is flexible and less prone to scratches, and it has sufficient tensile strength. An innovative smartphone strap holder has been born.