In short, because you can! The idea of two pair of pants with each suit is nothing new. It used to be that having two pants made with your suit was always an option. These days many places don’t even offer the option, or if they do, they do not suggest it. Because of cloth utilization advantages, and because so little extra work is required to make an additional pant while already making a coat and pant, it has always been fiscally sensible to order one extra pant with your suits. And just think of all the advantages:
One of the great parts of having two pants for a suit is the ability to travel wearing the suit, and bring along the second pant. It’s like bringing two suits! You also will essentially double the life of your suit if it has two pants, as the wear and tear is greater over time on the pants than the coat. You will dry-clean the coat less often, therefore you will dramatically lengthen the suit’s life span by having two pants. You can always have one pair of pants at the cleaner’s being pressed and the other pair at the ready, fresh and pressed and good to go. The effective impact upon your wardrobe is like adding two suits to your rotation in terms of wear and tear, yet only costs an additional 25-30% more than the suit cost with just one pair of pants. It’s really a no-brainer when you’re going to the expense of having a nice suit made to get that extra pair of pants cut when you order it. And besides, think how glad you’ll be if you tear a hole in one of the pants accidentally.
by Alan M. Vinson