Instructables
Picture of Headphones in a Helmet
This is a very simple way of incorporating headphones in a helmet that allows headphones. 
Hint its better to find headphones with a mic and a little remote on the wire so you can change songs or answer a call. 

Adding headphones to your helmet will make your riding more extreme and fun. The music will get you pumped up. 
 
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Step 4: Your Done!

Picture of Your Done!
Now go and hit the slopes while listing to music and be Extreme.
Brilliant!
Blechmen (author)  The Cartographer2 years ago
Thank you don't forget to vote I really want this GO Pro
GO Pro? Wrong contest bro
Blechmen (author)  CoxNdix2 years ago
It's in the extreme challenge