![Dark Brown Long Sleeve T-Shirt with Crew-neck T-shirt Casual Outfits For Men In Their 30s: This combination of a crew-neck t-shirt and a dark brown long sleeve t-shirt is the ultimate laid-back ensemble for today's guy. For a smarter twist, why not add a pair of dark brown leather chelsea boots to the equation? Those wondering how to rock modern casual outfits in your 30s, this combination should answer your question.](https://cdn.lookastic.com/looks/crew-neck-t-shirt-long-sleeve-t-shirt-jeans-large-68034.jpg)
![Dark Brown Long Sleeve T-Shirt](https://cdn.lookastic.com/dark-brown-long-sleeve-t-shirt-original-9727581.jpg)
![White Crew-neck T-shirt](https://cdn.lookastic.com/white-crew-neck-t-shirt-original-386478.jpg)
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![Black Canvas Backpack](https://cdn.lookastic.com/black-canvas-backpack-original-8068423.jpg)
This combination of a crew-neck t-shirt and a dark brown long sleeve t-shirt is the ultimate laid-back ensemble for today's guy. For a smarter twist, why not add a pair of dark brown leather chelsea boots to the equation? Those wondering how to rock modern casual outfits in your 30s, this combination should answer your question.