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Top Gear Innovations for Fall and Winter

The brisk days of fall and cold nights of winter bring out the best in gear design and technology. When the mercury goes south with the birds, there’s little leeway for lapses in function and lots of room for flexing new ideas. Sometimes this means embracing the rare (eiderdown!), the clever (Gore-Tex under the foot!), and the revolutionary (a probe that divines avalanches!), while other times it just means leveraging existing ideas in new ways to make adventure safer, more comfortable, and more fun. —Steve Casimiro