For something on the casually cool end, try this pairing of a long sleeve t-shirt and white jeans. Black low top sneakers look wonderful complementing this outfit. So as you can see, it's a dapper, not to mention spring-appropriate, ensemble to have in your transeasonal rotation.
If the setting allows casual dressing, marry a long sleeve t-shirt with charcoal wool chinos. Black low top sneakers integrate perfectly within a multitude of ensembles. Keep this look in your front hall closet when spring sets it, and we guarantee you'll save time getting dressed on more than one morning.