Effortlessly blurring the line between cool and casual, this combo of a crew-neck sweater and a red and white long sleeve shirt will likely become one of your favorites. Tan leather boat shoes serve as the glue that ties this ensemble together. One actually can remain fresh yet stylish under the sweltering heat, and this ensemble is a good illustration of just that Casual combos for stylish 30-something guys aren't actually that hard, as you can see.