Dude, don't do it! The permanent crease usually involves chemicals (sometimes glue) and high temperatures. The web is full of home remedies, but once the treatment is applied, your trousers are basically done for.
Point of clarification: a permanent crease creates a line, if you will, that goes down each trouser leg. I believe the question at hand refers to what are better termed "wrinkle-free" or "crease-resistant" trousers. Our reader is correct. The concept was first popularised in the form of men's shirts, primarily by business travellers, for obvious reasons. Italian label Kiton offers trousers in hi-tech fabrics designed to avoid wrinkles and I have my eye on a Nantucket red pair (HK$7,980; IFC Mall, Central, tel: 2234 7882), as well as the dark denims (HK$8,380). Advantage Chinos at Brooks Brothers are made with a wrinkle-resistant, treated cotton and are available in up to seven neutral shades (HK$880 and up; IFC Mall, tel: 2234 7088). In suiting, Ermenegildo Zegna is leader of the pack with its High Performance line, including the Trofeo Comfort trousers in classic colours (HK$7,500; IFC Mall, tel: 2295 0828).
