For a look that's refined and absolutely wow-worthy, consider teaming a navy turtleneck with brown dress pants. You could perhaps get a little creative in the footwear department and complete your outfit with a pair of brown suede desert boots. When temps are dipping and autumn is in full swing, you'll love this look as your go-to for transitional weather. When it comes to fashion tips for mature gents, this getup looks cool on most gents.