The Arc'teryx Women's Atom LT Vest is a top-rated sleeveless waterproof activewear vest that offers exceptional warmth and versatility. It is made with Coreloft synthetic insulation, which provides excellent insulation and retains warmth even when wet. The vest is also water-resistant, making it suitable for outdoor activities in light rain or snow. It features a full zip front and a high collar for added protection against the cold. With its lightweight and breathable design, the Arc'teryx Women's Atom LT Vest is a popular choice for women's activewear.