A blazer looks especially classy when paired with a grey waistcoat. After 30, you probably want to start dressing like an adult. In this case, ensembles like this are ideal as inspo.
Grey Waistcoat with Blazer Smart Casual Chill Weather Outfits In Their 30s
You'll be amazed at how super easy it is to put together this elegant ensemble. Just a blazer and a grey waistcoat. Overall, a perfect example of smart casual fashion for 30-year-old guys.
Putting together a blazer and a grey waistcoat is a fail-safe way to breathe style into your current wardrobe. Now that's how you do smart casual over 30.