The warm, windproof, and water-resistant Nano Puff Vest is made with incredibly lightweight and packable 60-gram PrimaLoft Gold Insulation Eco. Made with PURE (Produced Using Reduced Emissions) technology, this insulation is made from 100% post-consumer recycled polyester, encased in a 100% recycled polyester shell and liner, and manufactured in a Fair Trade Certified facility.