My little one and I absolutely love these. He was eager to put them on as soon as they arrived and has never complained or attempted to take them off, so they must be super comfortable. I placed one of the cups against my own ear and was amazed by how much noise it blocked. My son wears these when I take him along to a rock band rehearsal and I have complete confidence that his ears are fully protected from the (considerable) noise. He even slept through the end of a rehearsal while in his ear defenders! I would have zero hesitation in recommending them to other parents. The only drawback is that I don't know how much use he will get out of these - he is 22m so I bought the smaller size and he already has them at the largest setting.