Quality of down is measured by it’s fill power. Fill power is the measurement of the amount of space one ounce down will occupy when it reaches its maximum loft. The higher the fill power, the larger the down clusters and the greater the airspace to trap more of body heat. All our down is RDS and Bluesign certificated and is processed at the Allied Feather and Down facility in California. With Track My Down, you can see exactly what makes the down inside your garment unique – from verified fill powers that exceed what is claimed to cleanliness and content analysis. Every product has a unique ID number/QR code. Visit www.trackmydown.com to find out more.