The Archer Herringbone Shirtjac is fully insulated with DuPont™ Sorona insulation for extra warmth. DuPont™ Sorona is a plant-based fill that is a renewably sourced type of insulation with supreme warmth retention. You’ll find a chest pocket with snap closure and quick-dry fleece-lined hand warmer pockets on the side seam that disappear when not in use but are readily available when needed. Premium branded metal snaps at the center front. Roll up your sleeves if needed or make room for gloves with our adjustable cuffs with gusset.