Why not pair a grey hoodie with olive cargo pants? Both of these items are very practical and will look cool matched together. You could perhaps get a little creative when it comes to shoes and complete your getup with brown athletic shoes. Relaxed combinations for 30-something Millennial gentlemen aren't actually that hard, as you see here.
Grey Hoodie with Brown Athletic Shoes Outfits For Men In Their 30s
For comfort dressing with a modernized spin, consider pairing a grey hoodie with olive chinos. Slip into a pair of brown athletic shoes to make a sober outfit feel suddenly edgier. Wondering how to nail casual style as you pass the big three-oh? This combination is a great example.