Perfectly suited to running Helmet

This headset is perfect for the practice of running. The headphones fit perfectly in place as long as you chose the right fingers fixing the pinna.
The sound is well balanced with a little more to the bass.
One complaint I have a version of this helmet developed for Adidas and it was accompanied by an additional cord with a volume control. What this reveals handy running.
This version while more expensive is lacking.
Apart from this last point, I am fully satisfied with this headset, Sennheiser brand remains faithful to its excellent quality.