Warm, windproof, water-resistant and super compressible, Nano Puff products are made with 22-denier 100% recycled polyester and insulated with 60-g PrimaLoft® Gold Insulation Eco with 55% post consumer recycled content. While not quite as warm as down, synthetic insulation will keep you warm even when wet. Windproof and water-resistant, the Nano Puff® Vest is made with warm, incredibly lightweight, highly compressible 60-g PrimaLoft® Gold insulation; ideal as outerwear or as an insulating layer in colder climates. Lightweight ripstop recycled polyester shell fabric has a DWR (durable water repellent) finish The most thermally efficient synthetic insulation available; water-repellent, compressible 60-g PrimaLoft® Gold insulation has excellent warmth-to-weight ratio and maintains 96% of warmth, even when wet Brick quilting pattern with narrow horizontal quilt lines on side panels stabilizes insulation.