commuter - How do you clip your helmet to your bag when not wearing it? - Bicycles Stack Exchange
Haf-Clip straps your helmet chin bar, knee pads and jacket to the steerer tube - Bikerumor
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Amazon.com: Cosmos Pack of 3 Bike Helmet Speed Clip Bicycle Helmet Quick Release Buckle Pull Buckle for Universal Helmet, Fit ONLY for 0.75 Inch / 2 cm Width Chin Strap , Buckles
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