Our lightest insulated jacket excels in all mid-output mountain activities. From shoulder-season hikes to easy winter runs, its recycled stretch insulation delivers targeted warmth to your core without limiting mobility. Uninsulated sleeves and stretchy, fleece-lined side panels boost breathability and make for easy overhead movements. Made for hikers. Loved by athletes, runners, skiers, and guides. Lightweight stretch Octa® Fleece side panels provide freedom of movement and improve ventilation Durable, lightweight Fortius™ Air 20 stretch nylon plain-weave face fabric for maximum airflow Ultra-breathable, 100% recycled stretch Coreloft™ synthetic insulation keeps your torso warm Uninsulated sleeves for reduced weight, extra arm mobility, and easy packability FC0 DWR (Durable Water Repellent) finish repels moisture and is free from intentionally added PFAS Contrast: Octa® Polyester Fleece, 40D Delta Face, 122gsm - 100% Polyester Synthetic Insulation: Coreloft™ Stretch, 40gsm - 100% Polyester Lining: Recycled 20d nylon plain weave weft stretch FC0 DWR, 58gsm - 88% Nylon, 12% Elastane Body: Fortius™ Air 20 - Plain Weave, FC0 DWR, 58gsm - 88% Nylon, 12% Elastane