Stella McCartney may be quintessentially British, but her Pre-Fall 2014 collection is immutably connected to a different locale: Argentina. In partnership with the Nature Conservancy and Ovis XXI, a South American network of sheep ranchers, the designer sourced sustainable Patagonian wool for her line of slouchy blazers, boxy fringed tops, and oversize clutches. McCartney’s goal, she says, was “to help conserve and restore the region’s endangered grasslands” by promoting healthy grazing practices. The inspiration for the line’s updated houndstooth pattern, meanwhile, is rooted in her own English upbringing. “I thought about my childhood, growing up in London, and then moving suddenly to the countryside,” McCartney explains. “What a contrast."