I got tired of breaking the standard tether (RAM-HOL-UN7TU), so I figured I'd make my own.

Fits my phone which measures about 160x82x12mm, but can be scaled or edited to whatever size you want.

Printed with NinjaFlex 85A TPU with 0.8mm nozzle at 0.32mm layer height and ironing on. It's considerably less stretchy than the RAM material, so I had to make it larger and thinner.

I'm pretty happy with the result so far, but be warned that I haven't battle-tested it yet, hence the WIP status.