The Women's Ridge Flow shirt from Patagonia is a lightweight and airy shirt that allows your skin to breathe while you're on the move. This moisture-wicking shirt is a fast-drying running top with a keyhole design in the back for added ventilation, providing maximum airflow without sacrificing performance. Features Lightweight 70% recycled fabric, with unique jacquard that allows for faster drying, wicking and breathability. Open back design for added breathability. Soft and comfortable next to skin feel. HeiQ Pure odour control. Reflective logo. Fair Trade Certified sewn. Claimed Weight: 79g Materials: 4oz 100% polyester (70% recycled) jacquard jersey with a HeiQ Pure odour control and wick finish.