Helmet boomy but very good, with a good equalizer, fine. By cons, one of the atria does not work after one year. And despite the "Lifetime Warranty" I do not know who to turn to: the seller says it is not within its jurisdiction and I do not know where to send the Koss :( :( Edit: So I contacted Koss tells me to go through Hama who tells me to go through Amazon. In short, everyone rejects the hot potato. This helmet, I bought it because it was "Lifetime Warranty" and he broke down in less than a year. It's been 2 1/2 months and I'm trying to get by me that. If I have to return it at my expense at Koss, Canada, as I thought I understood, it will not do it at all !!! I am very unhappy, I note down.
