The wind-resistant Women's Aconcagua Vest has been designed with a hybrid construction with 550 fill power natural down insulation in the main body and recycled synthetic Heatseeker™ Eco synthetic insulation in the side panels for a great warmth-to-weight ratio and a flattering fit. The North Face Women’s Aconcagua Vest is a great option for extra core body warmth and packs easily in your backpack until you need it. The North Face Women's Aconcagua Vest Features: 40D WindWall 100% Nylon Durable Water-Repellent (DWR) Finish 550 Fill Goose Down Throughout the Body Heatseeker™ Eco Side Panels Secure-Zip Handwarmer Pockets Embroidered Logo Left Chest and Right Shoulder VISLON Centre Front Zip Cozy, Brushed Chin Guard Lining 100% Nylon with DWR Finish Highly Wind Resistant Weight Approx 380g