This combination of a crew-neck sweater and a navy long sleeve shirt is a safe and very fashionable bet. Finishing off with a pair of dark brown leather sandals is a surefire way to inject a touch of stylish casualness into this outfit. There are a ton of ways to look neat and live through the heatwave, and this here is one of them. As you can see here, as a guy in his thirties, you have a wide array of outfit options.
Navy Long Sleeve Shirt with Crew-neck Sweater Casual Summer Outfits For Men In Their 30s
If you don't like putting too much effort into your looks, wear a crew-neck sweater with a navy long sleeve shirt. Send this ensemble in a sportier direction by sporting a pair of navy low top sneakers. Needless to say, it's easier to work through a roasting hot summer afternoon in a easy and breezy outfit like this. A good, less conservative combo for a gent in his 30s.