I've been using this headband for sports for about 2 months now. I'm not the type to sweat a lot when I exercise, but I've found this brace to slip off my arm even when I'm outside in a long-sleeved shirt or jacket. I'm worried, but it's too late to return it. I used to have the Armpocket brand (an older model that I had to replace because my new phone didn't work in it) and the Armpocket was much better than them and held on my arm better. I would recommend you to buy the Armpocket brand instead of this brand because even if you pay more it is the best quality and worth it. Otherwise all other features work fine with my iPhone XS. Still, I wouldn't recommend it.
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