This insulated Jac-Shirt from Filson is a warm layer that combines the versatility of the brands original Jac-Shirt with the wind resistance and breathability of tightly woven cotton cover cloth. The 6-oz 100% cotton fabric is tightly woven to block cold wind while remaining breathable. Quilted between the inner and outer layers of cover cloth is a lightweight polyester insulation that continues to insulate even when wet. The sleeves are lined with polyester to slide easily over layers. Hand pockets are lined with Filson's signature Alaska Guide flannel for added warmth. Chest pockets secure with snapped flaps that are one-hand-operable. Snap-secure front closure and adjustable cuffs. Shirttail hem. **Key Info:** * Relaxed Fit * 6-oz. 100% cotton cover cloth * Lightweight polyfill quilted insulation * Snap-front closure * Flannel-lined hand pockets * Snap-flap chest pockets * 75% cotton/25% polyester fleece resists shrinking * FMCPS0061 W0212 916 Headquartered in Seattle, Washingt