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KNOW YOUR TECH breaks down the scientific technology used in your favorite sneakers and activewear. Let’s demystify your next purchase: today’s technology is The North Face Polartec. Offered in a range of varieties including Polartec Thermal Pro, Polartec Classic Series, and Polartec Eco, this insulation has been popular with outdoor enthusiasts for nearly two decades. Whether you're looking for a lightweight layer or heavyweight thermal insulation, you're sure to find what you need with The North Face Polartec.

What is it? The North Face Polartec is an insulation fabric that is available in a variety of textures and weights. Offering a high warmth-to-weight ratio, Polartec Thermal Pro is the most advanced of the technical insulation fabrics and is ideal for a wide range of activities. The Polartec Classic Series is available in lightweight, midweight, and heavyweight layers, covering everything from a warm first layer to a thermal layer for extreme excursions.

How does it work? The North Face Polartec provides its wearer with insulation and warmth during outdoor activities in the fall and winter. Thanks to its wide range of weights and styles, Polartec can be easily matched and combined with other cold-weather apparel.

Notable products: The North Face Power Stretch Glove, The North Face Denali Jacket, The North Face TKA 100 Alps Jacket, The North Face Vicente Jacket

Bottom line: While it's not quite as heavy duty as The North Face Goose Down Fill, Polartec is a reliable and time-tested option for cold weather.

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