Effortlessly blurring the line between sharp and relaxed, this combination of a white and black horizontal striped crew-neck sweater and a white long sleeve shirt can easily become one of your go-tos. Look at how nice this ensemble is completed with brown leather desert boots. A cool summer-to-fall getup like this one makes it very easy to embrace the new season. When it comes to casual fashion for gents over 30, this getup is perfect.