With recycled ECOLoft™ Air SR Insulation, the Sirdal jacket has high-performance warmth-to-weight ratio. Its light, relaxed-fit enhances your ability to move in nature in changeable conditions. The planet-friendly synthetic insulation also avoids clumping when wet, unlike traditional down fill. The outer fabric is ripstop and built to last. It has a PFC-free water repellent treatment – another win for you and the environment.