Warm, windproof, water-resistantthe Boys Nano Puff Jacket 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 NetPlus 100% postconsumer recycled nylon ripstop shell that's made from recycled fishing nets to help reduce ocean plastic pollution. Fair Trade Certified sewn.