You'll be amazed at how extremely easy it is to pull together this polished outfit. Just a blue check three piece suit paired with a grey dress shirt. Brown leather double monks are a surefire way to add a dose of stylish casualness to this getup. So as you can see, it's super easy to look seriously stylish and stay warm when chillier weather comes, thanks to this look. So if you need fashion tips on how to dress as you head into your 30s, this pairing is a great example.