Carhartt Men’s Ripstop Relaxed Fit Canvas Top Flannel Lined Snap-Front Shirt Jac. This men's mid-weight shirt jac is made for all-day work that gets the job done. Durable cotton ripstop is lined with a soft flannel layer for warmth and comfort you can move in. The canvas outer layer gives you the range of motion you need on the job. Comes equipped with two front chest pockets that provide convenient storage.