It's a utility shirt, tweaked to be supremely more comfortable. Part of Flint and Tinder's High Desert capsule collection (the field jacket is pretty amazing too), it's made from comfortable half-Panama fabric that is somehow light and breathable, yet still plenty durable. There's a touch of stretch, making it very easy to roll up the sleeves or pull over your favorite tee. Garment-dyed for a well-worn look, it'll continue to fade ever so slightly with each wear and wash.
Stretch utility shirt,
$98 by Flint and Tinder