A blue crew-neck t-shirt and blue jeans are must-have menswear staples if you're planning an off-duty wardrobe that holds to the highest fashion standards. A pair of white and black leather low top sneakers will tie the whole thing together. So if you're on a mission for a cool look that transitions easily into spring, this one is great. Wondering how to master casual style as you step into your 40s? This combo is a great example.