A kevlar flannel shirt is a type of protective outerwear designed for motorcycle riders. It combines the style of a flannel shirt with the protective properties of kevlar material. The kevlar material provides abrasion resistance in the event of a crash, while the flannel shirt design offers comfort and casual style. These shirts often feature reinforced seams and padding in impact-prone areas for added protection. The combination of protection, comfort, and style makes the kevlar flannel shirt a popular choice for many riders who want to maintain a casual, yet protective, look while riding a motorcycle.