This is a strap with a sticky rubber surface on one side and velcro fastener. No los recomendaría por muchas horas de uso por que pueden causar ligeros dolores de cabeza, tal vez por como funciona la tecnología, tampoco creo que tengan tan buena calidad de audio como mis otros audífonos shure. Please let me know if my review was helpful! You definitely need narrow feet for these to be really comfortable. And they are already falling apart. GET ‘EM! Connected to my apple watch the signal doesnt drop at all; connected to my phone, the range is maybe a little less than indicated but still quite good. Love this shirt looks exactly like the picture. it holds about 9 pairs of shoes/boots and we have our slides situated underneath. Though I have yet to test the claim, the company states that the case will charge the buds for well over 100 hours of playback time.