International Down and Feather Testing Laboratory
IDFL Laboratory and Institute, originally known as the International Down and Feather Testing Laboratory, is a facility based in Salt Lake City, Utah, specializing in testing down and feathers. It tests filled textiles for materials like down, feathers, synthetics, and other natural fibers, alongside auditing and inspecting the textile industry.
Source: Wikipedia — International Down and Feather Testing Laboratory (CC BY-SA 4.0)