This piece is definitely a wardrobe essential. Alex Mill's Frontier Shirt is an unpretentious version of an all-American classic. The brand made their chamois the old fashioned way, with a brushed flannel that's been given a special garment-wash to give it a worn-in, ultra-luxe feel. It's available in three rich shades, but the “thyme” green is the one to beat.
$135 by Alex Mill