Double blah

I bought these headphones for my son who is very sensitive to noise ears. In fact the foldable helmet on himself - believed to facilitate transport - makes it more difficult the establishment of the helmet on the child's head; My son has trouble putting it alone. It is true that many filters the sound, but it GREENHOUSE head so hard that it is IMPOSSIBLE to wear it long! My 6 year old boy supports it very difficult beyond a minute, he has the impression of having head caught in a vice. I do not recommend this product, planned anyway for children, but that is totally uncomfortable.