Now that there's a nip to the air, you may want to check out some of the hottest sweaters that'll keep you warm this season. But not all sweaters look great on everybody. When you want to don a pretty sweater, try the following trends. A sweater works for a casual, dressy or office look when it's layered. This season, a hot trend is to wear a well-fitting crewneck or v-neck sweater over a crisp, button-down shirt. Not only will you have a great, preppy look, but you'll also have a layer that you can remove if the office gets too stuffy or there's an unseasonably warm day. The same goes for the classic sweater layered with a matching cardigan. Get a set in a bright color to warm up dreary winter days - this combo looks good on most anyone with jeans, slacks or a skirt on the bottom and can be accessorized with pretty much anything.