The RAB Xenair Vest delivers lightweight insulation engineered for active mountaineers and backcountry adventurers. Featuring RAB's proprietary synthetic insulation, this vest provides exceptional warmth-to-weight ratio without the bulk, making it ideal for layering in unpredictable alpine conditions. The durable outer fabric resists abrasion and wind, while the streamlined design allows unrestricted arm movement for climbing and technical pursuits. Compact and packable, it transitions seamlessly from base layer to standalone piece depending on conditions. A trusted choice for serious outdoor enthusiasts who demand reliable performance in demanding terrain.