Hats are a piece of material worn on the head to provide warmth to the wearer's head or hats may be worn for aesthetic reasons as a fashion accessory.
About Plaid:
Plaid is a term used to describe fabrics or materials which feature horizontal and vertical color stripes over a contrasting solid color to create a checkered pattern that resembles a Scottish tartan. Plaid designs have been around for centuries but more recently they have been revived to convey a lively, colorful and fresh look in bags, footwear and apparel.