I bought this helmet in 2 copies for my kids (3 and 5 years) to listen to their movies and cartoons in the car. I tried it before putting on their ears and I tested the volume limit feature 85 db that had guided me to this. And I must say that it is highly effective. You can push the sound of the DVD player with no risk to the ears of our little ones. And it is even effective for ours as 85 dB is loud enough to hear everything without being completely cut off from its surroundings. The headphones include well the ears of children and also avoid turning up the volume to compensate for the noise of the car.The réglabe helmet child to adult, he shakes his head but not too much, foams are comfortable. Helmets are customizable with trims (on the ears) but can also provide an opportunity for an activity with children. The box is solid and useful because it is the storage box of the helmet. Helmets (also customizable) remain in the car behind the passenger seats placed in their boxes, are used at any time while traveling.