I don't know if it's because of the size, but it's the biggest one I've had... I have to wear it as low as possible so that it doesn't leak too much water, resulting in excessive pressure on my nose and causing it to tilt. If I wear it a little higher to avoid discomfort, too much water enters and it also makes noise when breathing, as if there is water inside and you can't comfortably breathe the air you need... The second problem is that it fogs up immediately... I had previously bought a mask from another company and it was perfect, but this one I will give away because it doesn't suit me at all, it is tiring and even dangerous.