Worn Once Men's Chamois Shirt, Traditional Fit, Stripe Size: Medium 100% Cotton Our heaviest-weight flannel, now in stripes. Made of thick chamois fabric that's warmer than ordinary flannel, it's a shirt, light jacket and essential layer all in one. Unbreakable buttons. Double-stitched seams for toughness. Original angled pockets and cross-stitched buttons. Shirttail hem. Imported.