A beige fleece shirt jacket looks especially good when matched with olive sweatpants in a casual look. To give your overall ensemble a more relaxed touch, why not complete your ensemble with a pair of athletic shoes? Off-duty outfits for gents in their thirties aren't actually that hard, as you can see.
Why not wear an olive gilet and olive sweatpants? As well as totally functional, these two pieces look amazing combined together. For something more on the daring side to finish off this ensemble, introduce a pair of athletic shoes to your outfit. This combo demonstrates how to remain fashionable as you pass the big 3-0.