Rab utilizes technical synthetic insulation to make this versatile insulator. The Cirrus Flex Insulated Vest features re-engineered PrimaLoft Silver RISE insulation in larger baffles for extra loft and impressive warmth. Pertex Quantum fabric keeps weight low while offering reliable trail protection, and stretch side panels keep us active and comfortable. Responsible Collection: Recycled/Repurposed Material: [face fabric, lining] Pertex Quantum (20D recycled synthetic, PFC-free DWR treatment), [side panels] Thermic fleece Insulation: PrimaLoft Silver RISE (100% recycled synthetic) Fit: slim Length: hip