You'll be amazed at how easy it is for any gent to pull together this effortlessly neat look. Just a shawl cardigan paired with a dress shirt. During the winter months, when warmth is key, it can be easy to surrender to a less-than-stylish outfit in the name of practicality. But this outfit is a bright example that you can actually stay toasty and remain stylish at the same time in the winter months. And if we're talking outfit ideas for men in their 30s, this look is perfect.