StarHemie Clear Bumper Case ($5)
TPU cases are popular because they do an excellent job at keeping phones safe. They're also extremely cheap and easy to install.
However, we've found a TPU case that looks similar to what we typically recommend from the brand Spigen. Since they aren't making cases for the OP5, other brands are stepping up.
The Starhemie Clear Bumper case is a completely clear TPU case with three extra layers of TPU on the corners. Making it a thin clear case with added bumper and drop protection. You don't really need to know anything else, aside from this will absolutely keep the phone safe from drops and damage.
Buy it Now on Amazon for $4.89 in three colors