Most "expert" guidance says that linen should be used for the classic white TV-fold pocket square. The reasons are unclear to me, and I disagree that linen is the best choice--I think that cotton makes the best choice. For starters, hand-rolled cotton hankerchiefs are available for about 1/4 the price of their linen counterparts. Also consider that cotton is easier to press and fold, has a cleaner white color, and--perhaps most importantly--has a smoother, slightly more formal hand in general, and I see no reason why linen seems to be the overwhelmingly preferred choice. What do you think?