You'll be amazed at how extremely easy it is for any gent to put together this casually classic ensemble. Just a navy knit blazer combined with olive chinos. And if you want to instantly step up your outfit with footwear, why not complement your ensemble with a pair of brown leather oxford shoes? Come roasting hot sunny days you're looking for a look to keep you fresh and sharp –– this ensemble is just the right one. Now that's how you do semi-formal in your forties.