Consider pairing a navy and white crew-neck sweater with navy jeans to pull together an interesting and modern-looking casual outfit. For a more relaxed feel, complete your look with a pair of work boots. And if we're talking casual outfit ideas for gentlemen in their 30s, this getup is perfect.
Go for a straightforward but casually dapper choice by teaming a navy and white crew-neck sweater and olive chinos. To bring out a more easy-going side of you, add work boots to the mix. If you frequently wonder how to dress your age but also look stylish, this combo is an amazing example.