It was easy to fit my device into the armband, the first few times it was a bit difficult to attach as the armband was a bit stiff. However, the clasp digs into my wrist if I buckle the strap too tight, but I feel the looser fit is affecting my tracker's accuracy. I'm also not sure if the metal that makes up the clasp is listed, but I've found my wrist to start itching and turning slightly red as if I'm reacting to the metal.
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