The Patagonia Isthmus Parka pairs a warm fleece interior with 60-gram Thermogreen insulation in the sleeves so no part of the jacket runs cold. The NetPlus shell, made from postconsumer recycled fishing nets, blocks wind and carries a DWR finish free of intentionally added PFAS, so the parka handles the city's worst days without the chemistry trade-offs. What Our Gearhead® Experts Are Saying:"I wear this from October through March because the fleece-lined torso keeps me warm through a full day outside without needing a separate midlayer underneath."