Showcase your classy self in a v-neck sweater and grey dress pants. If not sure about what to wear when it comes to shoes, stick to a pair of derby shoes. So as you can see here, it's a killer, not to mention spring-friendly, outfit to have in your transitional rotation. As you're approaching your 30s, you want to start dressing more elegantly. In this case, outfits like this come in very useful.