Warm, Windproof, Water-resistant—the Nano Puff® Vest Uses Incredibly Lightweight And Highly Compressible 60-g Primaloft® Gold Insulation Eco (100% Polyester That’s At Least 55% Postconsumer Recycled) Wrapped In A 100% Recycled Polyester Shell And Lining. Starting In 2020, We Are Transitioning Our Nano Puff Styles To Primaloft’s Innovative 100% Postconsumer Recycled Polyester Insulation Made With P.U.R.E.™ (Produced Using Reduced Emissions) Technology, Which Provides Excellent Warmth For Its Weight, Stays Warm When Wet And Reduces Carbon Emissions As Compared To Conventional Production Methods. Fair Trade Certified™ Sewn.