I only use soft rubber holder.From an old post but wondering if anyone has a link for a better holder (Armytek?) than the silicone holder that ZL ships with it's lights? I'm looking to upgrade to a H604c from my old ZL (can't even remember the model... long discontinued) and I never loved the silicone holder as it would slip if I was running or bouncing around.
The best soft rubber mounts are the old Armytek, same material as the Zebralight ones but larger and more stable.
I have two but they have been out of production for a long time.
If you want I can see if the Armytek hard plastic holder (old models) fit the Zebralight.