A dark green sweatshirt and charcoal jeans are must-have menswear staples if you're picking out an off-duty wardrobe that holds to the highest sartorial standards. A good pair of white leather low top sneakers ties this getup together. A vivid example of transeasonal style, this getup is ideal this spring. And if we're talking casual fashion tips for guys over 30, this look looks good on most gentlemen.