The Patagonia Nano-Air Ultralight Pullover Mens is a versatile men's running jacket designed to enhance your layering system with its lightweight and compressible features. This pullover is perfect for active days in cooler weather, offering breathability and a hint of warmth to keep you comfortable. Crafted in a Fair Trade Certified factory, it ensures ethical production standards. Made from 100% recycled polyester ripstop for durability and stretch Features a durable water repellent (DWR) finish without added PFAS Lightweight 20-g FullRange insulation provides warmth and breathability Slim fit design for comfort under harnesses and backpacks Two-way zipper for adjustable ventilation Self-stuffing chest pocket for easy storage and accessibility Moisture-wicking cuffs made from Capilene Cool Lightweight fabric Produced in a Fair Trade Certified factory for ethical manufacturing Fabrics are bluesign approved for environmental responsibility Weight 218 g (7.7 oz) Size and Fit Fit: Slim f