When the cable rubs against a surface, e. The sound is taken in by the microphones, and pumped in to the earphones. Vivo en un lugar que tiende a ser de clima cálido. To be honest, it exceeded my expectations, as I thought it would be low quality for the price (it is not, it is great quality). My wife has the expensive Pods, and since I wear Bluetooth Hearing Aids during the day, I didnt need to spend that much money for Ear Buds. I wish I had found these years ago. The shoes are excellent for anyone active as they are lightweight and so so comfy! Dont know how it will work but we will see. 5 To accommodate the swelling and they barely fit, they run a little on the small side. Well, these here let you try out Birkenstock engineering and comfort for a small percentage of the price.