Used men’s Patagonia insulated pants size medium - grey. Description Nano Puff Pants. The men’s Nano Puff® Pants from Patagonia offer all-day insulation for cold weather outdoor adventures. They’re padded with low-bulk, 60-g PrimaLoft® Gold Insulation Eco (55% recycled) that provides puffy warmth. The front and back-lower legs are wrapped in a lightweight, recycled polyester shell fabric with a durable water-repellent finish. Patagonia reinforced the seat in a rugged nylon taslon fabric and equipped the pant with a fully functional zip fly. The seat of the pants has a zippered rear security pocket, and the front legs come with two slash hand pockets. Recycled polyester ripstop shell & lining Durable water-repellent finish 60g PrimaLoft® Gold Insulation Eco Reinforced seat with zippered security pocket Brick quilting pattern + horizontal quilt lines Elastic back for comfort and fit Front slash pockets Button front and zippered fly