When the situation permits casual dressing, consider pairing a puffer coat with a mustard v-neck sweater. For something more on the casual side to complete this ensemble, round off with a pair of multi colored athletic shoes. As you can see here, it's extremely easy to look amazing and stay snug when cooler weather arrives, thanks to this ensemble. Guys who are curious how to rock modern off-duty looks as you head into your 30s, this getup should answer your question.