The REI Swiftland Insulated Running Jacket is perfect for trail running or outdoor adventures, offering a balance of weather resistance, warmth, and mobility. Features: Weather Resistant: Nylon shell with durable water-repellent (DWR) finish on chest and shoulders blocks wind and sheds light rain. Flexible Design: Fleece-backed stretch polyester in the back, lower torso, and underarms enhances movement and comfort. Light Insulation: 40 g polyester insulation provides warmth without bulk. Convenient Pockets: Fleece-lined zippered hand pockets and a sleeve pocket for secure storage. Ventilation: Full-length zipper helps regulate body temperature. Added Comfort: Thumbholes keep sleeves in place; fold-over cuffs offer extra warmth. Reflective Details: Improve visibility in low light. Details: Fabric: Ripstop nylon (upper), 91% polyester/9% spandex fleece (lower), recycled polyester lining. Insulation: 40 g polyester (50% recycled). Back Length: 26 in. (hip-length). Weight: 10.2 oz. Care: Machine wash cold, gentle cycle; tumble dry low. Condition: Good condition with signs of light wear. Ideal for running, hiking, or everyday outdoor activities.