Consider pairing a tan cardigan with a white crew-neck t-shirt for a daily ensemble that's full of charm and personality. For something more on the elegant end to finish your ensemble, complete this getup with dark brown leather casual boots. When the coldest time of the year leaves you feeling a little less-than in the fashion department, this outfit just might solve the problem. This ensemble demonstrates that in your thirties you have a vast array of sartorial options.