Eddie Bauer is releasing a 1,000-fill puffy in October, and the North Face will debut a collection of Advanced Mountain Kit jackets and insulating pants warmed by 1,000-fill down next spring.

A jacket with 650-fill down takes up less volume than one with 1,000-fill down, so it’s denser and has less space for warm air. But when it comes to warmth, what really matters is how much of ...

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 Goose Down Fill ...