Why not opt for a crew-neck sweater and grey chinos? These pieces are totally comfortable and will look cool paired together. And if you wish to immediately tone down your ensemble with a pair of shoes, why not introduce a pair of dark green low top sneakers to the mix? So as you can see here, it's a stylish, not to mention spring-appropriate, look to keep in your transeasonal collection. Think it's hard for men in their 40s to nail modern casual outfits? This combo is definitive proof of otherwise.