Head strap is fully adjustable to fit all sizes
Head strap can be worn over a helmet or directly on your head in a headlamp-like position
QuickClip allows you to attach your GoPro to a backwards baseball cap or other 3mm to 10mm thick object
QuickClip enables ultra-compact, low-profile mounting

Product description
Includes a head strap and a quick clip for a variety of head- mounting options.
Fully adjustable to fit all sizes, the head strap can be worn over a helmet or directly on your head to capture footage from a headlamp-like perspective.
The quick clip enables ultra-compact, low-profile mounting, and can be used to attach your GoPro to a backwards baseball cap or other 3mm to 10mm thick object.

Set contains:
Head strap
Quick clip
Thumb screw