Red bottom hats are a very cool style of men's hats. The materials can be felt, straw, cotton cloth, etc. The style is usually a classic fedora, with a small dent on the top. What's cool about red bottom hats is the inside of the hat is a bright red color. When worn, you can see the flashy red under the brim. This eye-catching red gives the hat a very fashionable, modern feeling. Red bottom hats often have a black or brown ribbon tied around the outside.