Bought these to keep my motorcycle goggles on my head (only a problem when it's windy outside and the air is blowing everywhere). They sit well on my ears and around my head. My only complaint is that the temples on my glasses are a bit wide so it was very difficult to get the strap right. But since I connected this to a holder (which showed up fairly easily) it's still secure and I don't think it's going anywhere.
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