![White Crew-neck T-shirt with Long Cardigan Smart Casual Spring Outfits In Their 30s: A long cardigan and a white crew-neck t-shirt are a smart combination to incorporate into your daily fashion mix. If you need to immediately perk up your look with one item, why not complement your outfit with a pair of black leather heeled sandals? As the weather warms up, it's time to get rid of those heavy winter gear and choose a look that's lighter, like this one here.](https://cdn.lookastic.com/looks/long-cardigan-crew-neck-t-shirt-skinny-pants-large-39871.jpg)
![Tan Long Cardigan](https://cdn.lookastic.com/tan-long-cardigan-original-11509119.jpg)
![White Crew-neck T-shirt](https://cdn.lookastic.com/white-crew-neck-t-shirt-original-1311549.jpg)
![Black Skinny Pants](https://cdn.lookastic.com/black-skinny-pants-original-4261137.jpg)
![Black Leather Heeled Sandals](https://cdn.lookastic.com/black-leather-heeled-sandals-original-8074832.jpg)
![Black Leather Crossbody Bag](https://cdn.lookastic.com/black-leather-crossbody-bag-original-2350887.jpg)
![Brown Earrings](https://cdn.lookastic.com/brown-earrings-original-3980480.jpg)
A long cardigan and a white crew-neck t-shirt are a smart combination to incorporate into your daily fashion mix. If you need to immediately perk up your look with one item, why not complement your outfit with a pair of black leather heeled sandals? As the weather warms up, it's time to get rid of those heavy winter gear and choose a look that's lighter, like this one here.