Finally I found a perfect helmet!
It does not warm you perfectly hear what is happening around you by having it on the head but once the sound on, nobody there!
The 7.1 is the purest I have had, the sound is clear, no bass surabusées.
XL with a head and with glasses, this headset is THE only one not to hurt me and I have it on the head for 10 hours, I do not even have the feeling of having a helmet on my head so it is lightweight.
Plastics are very good factory, similar to a car brand with 5 rings.
Packaging is simplistic but the headset is a pure killing him, certainly the price is substantial, but it is worth the investment in such comfort and perceived quality is consistent.
Thank you Amazon for quick shipping and Sennheiser for this little jewelry that makes me happy every day!