Like new condition Nano Puff® The Nano Puff is a durable, warm and well-loved layer for chilly and possibly wet conditions. It performs so well that the only improvements we’ve made to this classic over the years is how we make it. The original design now features 100% recycled PrimaLoft® Gold insulation made with P.U.R.E. technology (Produced Using Reduced Emissions), 100% recycled shell and lining and a durable water repellent finish made without perfluorinated chemicals.