DriDown™

Sierra Designs DriDown™ is natural down insulation improved with a molecular-level polymer that provides a hydrophobic finish to individual down plumes.  You no longer have to choose betwen the lightweight, compressibility of down and the "warm when wet" advantage of synthetic.  By creating a water repellent down insulation, we effectively have removed down's downside.  The result: DriDown™ stays dry longer, lofts better, and dries faster than untreated down, keeping you warmer in any environment.