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In the spring, sunglasses are as vital to your success as skis. Peak Vision’s innovation is its Dual Zone Lens. With the GR4 ($199, peakvisionsports.com), the top of the lens is vermillion, to tame bright light and maintain distance perception. The bottom half is amber, to sharpen clarity in flat and low light. A drawback: They’re so light (.8 ounces), you’ll be constantly patting your head to see if they’re on.