A couple months ago, I wrote a post about wearing sport coats casually, and I wanted to put everything I said in there into practice today. This brown, all-cotton herringbone jacket by RRL does the trick perfectly, its design and fabric giving off a very casual vibe. Kept my shoes, belt, and bag in the same color family as the jacket for consistency, and combined those elements with a very versatile white shirt and dark blue selvedge jean.
By the way, if you have the opportunity to get a Filson bag, I highly recommend it. Durable, rugged, stylish, and carries a lifetime warranty. You can see mine gets used quite a bit, as my raw denim has rubbed off on the side of the bag.
I'm a fan of this jacket because of its herringbone design, which is usually found on wools, but in this case, on cotton.
Some of the most comfortable shoes I've ever worn. These suede chukka boots weren't cheap, but I think they were worth the extra money.