To pull together a casual ensemble with a modernized spin, opt for a turtleneck and jeans. An ideal ensemble to make you a well-dressed man in his 30s, rather than just a man in his 30s.
Jeans with Turtleneck Cold Weather Outfits For Men In Their 30s
The versatility of a turtleneck and jeans guarantees they'll always be on regular rotation. This getup illustrates that as a 30-something gentleman, you have a vast array of sartorial options.