Make this electronic accessory by 3D printing flexible bullets to layer over NeoPixel LED strip. This illuminated sash lights up in any color or pattern you can dream up and it's lightweight, flexible, and comfortable to wear.
I found my utility belt on Amazon, but you could also look for one at military surplus stores, thrift stores, or your grandpa's attic.
You could also substitute the belt for a tactical harness or suspenders. The belt you choose should be comfortable and fit you well, since you'll use it to attach pouches containing your batteries, cell phone, and other essentials.