A black quilted gilet and grey sweatpants are indispensable must-haves if you're picking out an off-duty wardrobe that holds to the highest fashion standards. Complete your look with black and white athletic shoes to infuse an air of stylish nonchalance into this outfit. So if you're scouting for a look that's stylish but also feels entirely spring-ready, this one is great. This combination shows that going from your 20s to your 30s is no reason to shed casual style altogether.