Relaxed fit, heavyweight, stretch flannel style Warmth and style meet, for our thickest flannel yet. The Survivalist Fire Stretch Flannel is a heavyweight addition to your flannel arsenal, but with added stretch for increased mobility as you go about your day. Soft, durable, and comfortable, this thick flannel is a warm option to layer under a jacket or wear over a T-shirt when the temps are chilly, but not cold.Relaxed, classic fitBrushed cotton material