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 Nike Shield. Continuing our recent theme of cold weather-ready products, Nike Shield provides weatherized protection and also adds an aesthetic flair that helps add visibility during nighttime runs. Chances are, you'll be caught in winter's elements at some point this season, so it's best to come prepared with technologies like Nike Shield.

What is it? Nike Shield is a treatment that adds weather-resistant properties to many of the brand's sneakers and apparel items. This helps to offer protection from the chill of the rain and cold weather while remaining breathable. Shield also uses Nike's reflective treatment, which is similar to 3M Scotchlite and adds visibility in low-lighting situations.

How does it work? Nike Shield's weatherized properties work by using an inner barrier to literally shield the foot from moisture and cold. Through the use of closed mesh on sneakers that previously used open mesh constructions, shoes featuring Shield maintain a comfortable level of breathability.

Notable products: Nike Running Winter 2013 Line, Nike Running Shield Collection, Nike Free Trainer 3.0 Mid Shield 

Bottom line: Don't get caught in the cold winter rain wearing a pair of sneakers that will leave your feet soaked. Try out Nike Shield technology to ensure a dry, warm run this season.

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