Your headlamp will stay securely in place on your caving or climbing helmet with the Helmet Headlamp Hooks from Fenix. The four hooks in the set clip onto the rim of your helmet, and hold the elastic headband in a channel. Each hook has a secondary hook for a power cable.
The Headlamp Hooks are for use with helmets up to 6mm thick, and are not for use with fully protective outdoor sports helmets or helmets with foam lining.
Fenix Flashlight ALD-02 Helmet Headlamp Hooks (Black, Pack of 4)