I bought them thinking they were bone conduction, but I was a little disappointed about that. Why?8) mic is garbage! Other than that they are great🙌 Super detailed and informative videos and database of all he has tested! Like many, I too was missing an end cap. I bought these because of two things. Still took an hour and I trust it to hold a bike over $50,000 worth of motorcycles. And the straps just broken on them too. Warm and easy to slip on and off. All of the foam seems to be wrapped in a thin fake leather material, and it feels nice.