Patagonia cotton shirt with Thermogreen™ insulation delivers lightweight warmth and practical detailing for everyday layering. Designed for casual wear, it pairs insulation performance with shirt-style utility. Key attributes: Brown | Cotton | Thermogreen™ insulation (80 g/m²) | Lightweight thermal warmth | Patch pockets with flap | Button closure | Casual shirt styling | Patch pocket detailing | Composition & care: Cotton | 100% polyester (Thermogreen™ insulation, 80 g/m²)