A Kevlar flannel shirt is a type of protective clothing that combines the traditional style of a flannel shirt with the added protection of Kevlar. Kevlar is a type of synthetic fiber that is known for its high strength and durability, and is often used in protective clothing such as bulletproof vests and motorcycle gear. A Kevlar flannel shirt would typically feature Kevlar reinforced fabric in key impact areas such as the shoulders, elbows, and back to provide added protection in the event of a crash. The rest of the shirt is made of flannel fabric, which provides a casual, stylish look. The shirt would be designed to be worn over motorcycle protective gear and can be worn on their own or under a motorcycle jacket. These types of shirts are not common, They are not readily available in the market and are often custom made.