For something on the cool and laid-back end, you can wear a sweatshirt and white cargo pants. To give this ensemble a sleeker touch, why not enter desert boots into the equation? Off-duty getups for stylish mature gentlemen aren't actually that hard, as you see here.
Sweatshirt with Desert Boots Warm Weather Outfits After 40
This relaxed casual pairing of a sweatshirt and olive chinos is a safe option when you need to look good but have zero time to dress up. The whole outfit comes together really well if you introduce a pair of desert boots to the equation. A safe bet pairing proper for 40-something gents who like casual dressing.