SYNTHETIC INSULATION WITH A HERITAGE LOOK. Made with the outdoors in mind, the Nike Sportswear Synthetic-Fill Vest is an updated take on a versatile layer. Its synthetic Thermoreâ¢ EcoDownâ¢ fill is quilted into the construction to add long-lasting warmth. Synthetic EcoDown Made with 100% recycled materials, Thermoreâ¢ EcoDownâ¢ sheet insulation adds low-profile warmth that's easy on the environment. Heritage By Design A raised silicone patch at the chest pays tribute to the original Windrunner. Allover square quilting helps EcoDownâ¢ Insulation lock in warmth. Product Details Standard fit for a relaxed, easy feel Body, lining and fill: 100% polyester Machine wash Imported Style: CZ1470; Color: Twilight Marsh/Twilight Marsh/Twilight Marsh/Black; Gender: Male; Age Group: Adult