Non-iron clothes are high tech products. Chemical treatments lock the woven threads in place at the intersections and are the key to preventing wrinkles. The manufacturer then presses in the desirable creases and pleats, bakes the clothes in an oven, cools them, and steams them to give a softy feel. Consider a pair of cotton Khakis with this"nano- technology." You wash and dry them, hang them up, and the slacks retain a decently sharp crease where you want it and otherwise lie flat and smooth. ...............42............ They are promoted as stain-resistant, so they got the salad-dressing treatment: the stain came out completely with one washing. The one caveat is how long the non-iron properties last? The industry rating system says anything labeled non-iron must hold its performance traits through five washings