There are many brands but the one I use is listed on Amazon as the Ugreen headphone splitter. They also feel very well made and sturdy, though are very lightweight. Wear 11. Ive only been wearing them for a week. Passt wie angegossen, sieht super aus und eine ganz tolle Passform und läuft sich wunderbar and not well built. Had to get a replacement for my headset   I would definitely say that it lasted at least a good five hours, maybe even a little more than that. It will be the 4th replacement I have had to order. I have bought Crocs before and consistently have the same problem.