The Arc'teryx Women's Atom LT Vest is a highly rated insulated activewear vest designed for versatile outdoor activities. It features Coreloft synthetic insulation that provides warmth even when wet. The vest has a slim fit and a low-profile collar for easy layering. It also has zippered hand pockets and an internal chest pocket for storing essentials. The Arc'teryx Women's Atom LT Vest is praised for its lightweight and breathable design, making it a favorite among active women.