![Dark Green Cardigan with Crew-neck T-shirt Casual Fall Outfits For Men In Their 30s: The formula for killer casual style for men? A dark green cardigan with a crew-neck t-shirt. When temps are starting to drop and fall is in the air, you'll appreciate how great this ensemble is for weird transition weather. Casual looks for 30-something gentlemen aren't actually that hard, as you see.](https://cdn.lookastic.com/looks/olive-shawl-cardigan-navy-and-red-long-sleeve-shirt-red-crew-neck-t-shirt-large-29307.jpg)
![Olive Shawl Cardigan](https://cdn.lookastic.com/olive-shawl-cardigan-original-2468679.jpg)
![Navy and Red Plaid Flannel Long Sleeve Shirt](https://cdn.lookastic.com/navy-and-red-plaid-flannel-long-sleeve-shirt-original-11506799.jpg)
![Red Crew-neck T-shirt](https://cdn.lookastic.com/red-crew-neck-t-shirt-original-387396.jpg)
![Navy Cargo Pants](https://cdn.lookastic.com/navy-cargo-pants-original-473688.jpg)
The formula for killer casual style for men? A dark green cardigan with a crew-neck t-shirt. When temps are starting to drop and fall is in the air, you'll appreciate how great this ensemble is for weird transition weather. Casual looks for 30-something gentlemen aren't actually that hard, as you see.