MJ-6276 GoPro helmet head mount, Garmin helmet head strap mount
Mountain Bike Cameras | Best GoPros for Mountain Biking (MTB)
Bicycle Vented Helmet Strap Mount for GoPro Hero 11/10/9/8/7/6/5/4/3, Swivel Bike Mounting Assembly Adjusting - Walmart.com
Amazon.com: iGuerburn Vented Helmet Strap Mount for GoPro Hero 11/10/9/8/7/6/5/4/3/3+/2/1, Adjustable GoPro Bike Helmet Mount with 360° Rotating Base : Electronics