What is a Shirtjac? Quite simply it's a shirt-jacket combo that makes an excellent work shirt and layering piece. Get the best of both worlds with a responsibly sourced down filled jacket that wears like a shirt. Pop-up rain showers? We’ve coated this lined shirt with a durable water repellency to help keep you dry. Easily accessible snap closure pockets are on the chest and on the interior chest. Side entry hand pockets with quick-dry fleece lining to keep your hands warm when you need to lean more into the “jac” side of this piece.Exterior Fabric: 6.6oz 72% Cotton, 28% NylonInsulation: Responsible Down Standard, Duck Down 80/20 500 Fill PowerDWR 80/20Classic Fit4 pocketsSide entry hand pockets with quick-dry polar fleece liningOne chest pocket with snap closureOne interior chest pocket with snap closureAdjustable cuffs with 2-snap closureMen's Size Chart Exterior Fabric: 6.6oz 72% Cotton, 28% Nylon Insulation: Responsible Down Standard, Duck Down 80/20 500 Fill Power DWR 80/20 Classic Fit