If you'd like take your casual game to a new height, dress in a blue turtleneck and navy jeans. A good pair of dark brown suede desert boots ties this outfit together. Keep this combination in mind when spring arrives, and rest assured, you'll save a lot of time getting dressed on more than one morning. Those who are dubious whether you can still wear cool casual outfits as you reach your 40s, this outfit should answer your question.