Plaid used to be the print of lumberjacks and brawny home improvement guys, but not anymore. These days, you can't walk down a city street without seeing someone sporting the pattern, and we don't mind. These red and green plaid pants have the pattern of your favorite flannel shirt and the style of your best pair of suit pants. Pair these Christmas pants with the matching red and green blazer, or maybe a turtleneck, and own the holiday party this year.