Why not make a black sweatshirt and black sweatpants your outfit choice? As well as very practical, these two items look awesome when paired together. A great pair of low top sneakers pulls this look together. This ensemble is a huge inspo to anyone who wasn't sure about dressing casually in your 40s.
Wear a black sweatshirt with black chinos to achieve a neat and relaxed outfit. Introduce a pair of low top sneakers to the mix and the whole getup will come together. Looking for fashion for 40-something gents? This pairing is pretty inspiring.
You'll be surprised at how easy it is for any guy to pull together a modern casual outfit like this. Just a black sweatshirt combined with black sweatpants. As for footwear, introduce a pair of low top sneakers to the mix. Think it's hard for gentlemen over 40 to perfect cool off-duty outfits? This pairing should prove you wrong.