Brace for the cold with the Filson Insulated Field Flannel Shirt a winter-ready upgrade to our classic Field Flannel. Crafted with 7-oz. 100% cotton flannel and premium PrimaLoft Gold insulation, this versatile layer delivers unparalleled warmth and comfort.

Midweight 7-oz. cotton flannel with 60g PrimaLoft Gold insulation
Breathable, water-resistant insulation retains warmth even when wet
Button-front with spread collar, button-adjustable cuffs, and chest

pockets

Center-back box pleat for easy mobility

Filson has taken their iconic Field Flannel Shirt to the next level with this insulated version. The tightly woven cotton fabric is heavily brushed for supreme softness, while the high-performance PrimaLoft insulation traps body heat to keep you warm in the harshest conditions. Unlike down, this synthetic insulation continues to insulate even when wet, so you can brave the elements with confidence. With a classic button-front design, adjustable cuffs, and convenient chest pockets, this flannel shirt delivers unbeatable warmth and versatility for all your cold-weather adventures.