These do what you want perfectly and thats what you look for. I?ve carried gear on top for group 4 guys camping for a week. I tried to use it to see if it works, and it does. I ordered myself and my 7 year old daughter a pair of chacos and my 3 boys got Tevas. Nice charging box and small to carry easily in a jacket pocket or coat. apres lavage vraiment tres petit et je suis tres petite! Quick to stick on in a hurry. Not sure if I received a previously used item, but one piece looked scratched superficially, and my item came with no instructions or warranties on how to use it. As for sound cancelling, it does a good job. I couldnt keep them because it didnt feel secure on my foot and my foot kept sliding around.