If you're going to invest in a quality blue blazer—and you should—find one that can be worn in a variety of settings. The Peter Millar Multi-Season Traveler is great for dinner in the clubhouse but can also be worn down, paired with jeans. It's optimized for travel so it won't wrinkle on an airplane or in your car. This blazer is 100 percent wool and has a slightly retro look with an angled chest pocket and notched lapel.
Outside of traditional clubwear, a recent trend in golf apparel is performance wear that can transition to more formal environs. Peter Millar is launching a true sports blazer this fall that is designed for those "play nine holes on the way to the wedding" types. Adidas is at the forefront of this trend with the Beyond 18 Oxford Shirt. It's got UV protection and mid-weight fabric that stretches, so you can certainly play a round of golf in it, but the fold-down collar and clean lines make it look like a nice dress shirt. This cotton-blend shirt pairs perfectly with a tailored pair of trousers, alone or under a sweater, and will make sure you're not "that guy" rolling in late to your niece's graduation in full golf apparel. Just make sure to take the scorecard out of your back pocket.
Jacket Required/Upscale: Peter Millar Multi-Season Traveler, $495
Casual: Beyond 18 Oxford shirt, $90