I don't know how long this has been around but I discovered it only about 6 months ago. Great for running, not as great for the indoor cycle trainer, where your head is down. Give it a shot!
https://www.sweatgutr.com/sweatbands
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https://connect.garmin.com/modern/profile/domingjm
https://www.sweatgutr.com/sweatbands
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https://connect.garmin.com/modern/profile/domingjm