When I received this cell phone bracelet I thought it was pretty light and not strong but I was hoping it would work and I was wrong. I don't know what material, but it's definitely softer and lighter than cotton t-shirts. Unfortunately, I was not in the least mistaken about the insufficient strength of this bandage. This thing broke after a single use on a 35 minute relaxing walk - not a workout but a walk! I don't want my phone to fall out while exercising. It wasn't tight for me and my OnePlus 5 is small. I'll send it back when I get a chance.
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