A dark green suit and a navy crew-neck t-shirt are absolute staples if you're piecing together a smart casual wardrobe that holds to the highest menswear standards. Why not complement this look with a pair of low top sneakers for a fun vibe? A safe bet combination appropriate for 40-something men.
As you can see here, it doesn't take that much work for a man to look casually sleek. Just opt for a dark green suit and a white crew-neck t-shirt and you'll look incredibly stylish. You can get a bit experimental in the footwear department and complement your outfit with a pair of low top sneakers. This pairing shows that after forty you still have a vast array of style options.