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 Columbia Omni-Wind Block. Part of the brand's all-encompassing Omni tech, Omni-Wind Block is designed to protect against one of the environment's most unpredictable forces. Fall and winter temperatures can be cold enough, but with added windchill, the cold can become nearly unbearable. Columbia Omni-Wind Block technology helps to ensure that wind doesn't enter your garment while remaining lightweight and breathable.