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My Pit Vipers are the only pair of sunglasses I own that can handle all of the above, and then some. A review on Pit Viper sunglasses for the backcountry. Powder aims to feature only the best products ...

Pit vipers, along with several of their snake cousins, marry two senses to better locate prey at night: sight and a heat-detecting ability. Deep pits, which lie on each side of the snake's face ...