Down is naturally very fluffy and light and has the marvelous ability to breath and “wick away” body moisture. Down is the undercoating of waterfowl. It consists of millions of light, fluffy filaments, growing from a central quill point. Every ounce of quality down has about 2 million fluffy filaments that interlock and overlap, creating a three-dimensional structure that traps air that makes down do desirable. The ability of these filaments to trap air is called “loft”. Down continually re-lofts and molds itself to the body without clumping. Because of its resilience, you can scrunch it up or flatten it out and it will still bounce back to its original shape in order to maintain its warm and fluffy properties.