The Women's Patagonia R1 Air Fleece Vest is a lightweight vest for layering up against cool weather. Hiking days to everyday wear around town, the zigzag-knit pattern works to increase airflow, minimize bulk, and compress for packing. It warms your core, ideally worn over a long sleeve base layer, without causing overheating. Wear it on its own during mild days, or add a jacket over top when the weather gets worse. The chest pocket and hand pockets are all zippered, offering security for your phone, keys, and snacks.