Summertime hats are built for covering up -- those floppy hats and fedoras shield your face from scorching UV rays, and hide those sweaty, salty "beachy waves" or your chlorine-crunchy mop. But when cool weather hits, hats are all about keeping your noggin' warm. Problem is, the minute you set foot inside and take off that beret, the damage is done: Your hair looks like it's been run through a turbo engine.

Whether you live in colder climates where wearing a hat is a necessity, or you're like me -- donning a hat for strictly sartorial reasons in Southern California -- you can prevent (or fix) a self-inflicted bad hair day with a few simple tricks. Click to see the top do's and don'ts for wearing winter hats from celeb stylist Josue Perez of Serge Normant at John Frieda in NYC, celebrity hairstylist George Gonzalez of George the Salon Chicago, and NYC based hairstylist Kyra Dorman.