1 Knit cap

At the Nicole Miller show at Fall 2010 New York Fashion Week, every runway model was wearing a basic black wool knit cap. And though you might not be willing to wear a beanie with your business suit or cocktail dress, you can take some inspiration from the show. Knit caps are easy to wear and affordable (you can pick one up from Old Navy or Gap for about $5). They're a terrific way to keep your head warm and can hide frizzy, flyaway hair. Perfect for casual wear, a knit hat goes great with your favorite jeans and sweater this fall.

Hottest Hats  For Cool Weather - Hat - Fashion  Hottest Hats  For Cool Weather - Hat - Fashion

2  Colorful cloche

The cloche is a bell-shaped, fitted hat that was originally popular in the 20s but has re-emerged in recent years as a popular choice for women. For fall, look for cloches in bold colors and soft fabrics. The cloche is often accented with ribbons, feathers, crystals and other feminine embellishments. Wear it casually or or as a nice complement to more dressy attire.