Check out the Armpod Smartview series. The phone holder is secure, protects your phone and makes you more visible with reflective details.
Arms are one of the best places to put reflective detail because they move as you run, catching headlights and the eye of the passing driver. When a driver sees your arm or other body parts in motion it activates part of the brain that can identify a human form, even in the dark.
The Microstretch-Flash waist pack comes in a neon color with reflective detail and a light that can stay on or flash at different speeds. It’s lightweight, breathable, adjustable, stretchy and expands to fit a full-size smartphone, keys, gel and credit cards. Plus, the light is rechargeable.