No Iron Oxford may be the best-made, longest-lasting No Iron shirt available. And now it s one of the softest too, thanks to U.s.-grown Supima cotton. We also sew gussets at the side seams for untucked wear, and — it s subtle, but significant — two pleats on the sleeve (rather than the former three) for less blousiness. As always, the fabric stays smooth for 30 washes without the touch of an iron.Supima is conscientiously sourced, American-grown cotton that s farmed to minimize environmental impact.