Our Fleece Lined Jac-Shirt bolsters a trusted Filson go-to with insulation for colder weather. Built with sturdy 10-oz. cotton canvas and lined with fleece in the body and polyfill in the arms. Purposeful details a-plenty. Fleece-lined side-seam handwarmer pockets. Pleated shoulders for range of motion. Garment-washed for a well-worn feel on day one.