Warm, windproof, water-resistant -the Nano Puff Hoody uses incredibly lightweight and highly compressible 60-g PrimaLoft Gold Insulation Eco 100% postconsumer recycled polyester with P.U.R.E. (Produced Using Reduced Emissions) technology, wrapped in a 100% recycled polyester shell and lining. Patagonia - Men's Nano Puff Hoody