Nature was on Stella McCartney's mind as she designed her latest collection for Adidas. And that was reflected here in quite a few ways: There were the impressionistic photographic prints of the countryside in the south of England, carried over from Pre-Fall, and wood-grain prints that were new; there was also an earthy palette including forest green and bark brown. But the really interesting engagement with nature was happening under the surface of this Adidas by Stella McCartney collection. For one thing, McCartney focused additional effort on using organic cotton, as well as introducing a low-waste dye process. Elsewhere, thermal running pants—featuring new "climaheat" technology—and McCartney's first trail-running shoe were less exemplary in terms of sustainability, but these did suggest that McCartney would like people to get outside, into nature, rather than merely appreciating it as an aesthetic. And if that exploration of nature should go awry? Not to fear, as long as you're wearing one of McCartney's ski jackets outfitted with Recco geolocation technology. GPS tracking never looked so good.