Tive que solicitar ajuda aos atendentes da Amazon. Pristine care has been taken. I have perforated my right eardrum twice and my left once while serving over seas in a combat zone. Ours is used nearly daily by three people and we’ve had no issues. Mine definitely has enough tension since it is sitting on an extra base (more than the 1" extra I needed just to touch the ceiling) for height. Waste time and money. -quizá falta agregar otra medida más de las gomitas de memoria solo incluye 1. Very impressed with the sellers willingness to make things right. Amazon wouldnt allow me to post without selecting a star rating. My daughter wears a size 12.