Aaron Gwin had a hand in designing the new Bell Full 9 helmet which includes built in Go Pro and Contour mounts!
If riding whilst listening to choons is your thing, the Full 9 also has in built speaker pockets and audio routing too.
Looks like you get one removable Go Pro mount on the top of the lid and one Contour mount on the left hand side.
Full Carbon too.
WEIGHT: 1050 GRAMS
VENTS: 10 vents, 3 brow ports
SIZES: XS 51-53cm, S 53-55cm
M 55-57cm, L 57-59cm
XL 59-61cm, XXL 61-63cm
TECHNOLOGIES:
Integrated, removable camera
mount
Soundtrax™ Speaker Pockets
and Audio Routing
Overbrow Ventilation
Magnefusion™ Removable Magnetic Cheekpads
Compatible with Eject Helmet Removal System
Removable, washable X-Static Extended Wear interior padding
Flying Bridge Visor™
Lightweight Full Carbon Shell
Integrated Roost Guard
ASTM Downhill Certified
CERTIFICATIONS:ASTM F1952-00 DH
CPSC; CE EN1078
£399.99
INCLUDES: Padded, lined helmet bag
GoPro compatible helmet mount
Contour compatible helmet mount
Bell Super All Mountain ruler.
WEIGHT: 375 GRAMS
VENTS: 25 vents, 4 brow ports
SIZES: Small 51-55cm
Medium 55-59cm
Large 59-63cm
TECHNOLOGIES:
SpeedDial™ Fit System
Overbrow Ventilation
Integrated, removable camera mount
GoggleGuide™ Adjustable Visor System
Fusion™ In-Mold Microshell
w/ low coverage rear X-Static™ Padding
Lightweight Webbing
Lightweight Buckle
Lightweight Cam-lock™ Levers
Registered Graphics
£124.99
CERTIFICATIONS:
CPSC; CE EN1078