Named after the highest peak in the Western Hemisphere, The North Face's Aconcagua 2 Vest offers premium lightweight warmth for adventure days. A WindWall™ exterior is breathable and keeps bitter winds at bay, while a combination of down and Heatseeker™ Eco insulation keeps warmth where you need it and reduces heat loss. Zipped pockets also ensure essentials are within easy reach, and a non-PFC Durable Water Repellent treatment sheds light showers. About WindWall™ WindWall™ fabrics are engineered to reduce the effects of chilling winds while maintaining a good level of breathability.