A matching blazer and trouser set is one of those wardrobe shortcuts that always looks like you put in more effort than you did. Theory gives this version a softer take with olive green sateen. The belted blazer defines the waist, while the matching pants keep the outfit cohesive from top to bottom. Wear the full set with heels for dinner or a work event, then break it apart with a white tee and sneakers for weekends.