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Have you ever seen people running outside in the depths of winter and shook your head as you drove to your heated yoga studio? Perhaps you've gone from marveling at the fortitude of the winter runners to looking for tips about how to keep comfortable when the weather outside is anything but. If that's true, one thing's for sure: You need the right clothes to bundle up because breaking a sweat isn't enjoyable if you aren't dressed in the right gear. Wearing proper cold weather workout clothes is essential for maintaining comfort and warmth during your workout sessions, so we rounded up the best options on the market.

To help, we found nine pieces you'll want to wear when the temperature drops, inspired by none other than Hailey Bieber's

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