The idea is you pay to the outfit station 200 Transmute Crystals to take a snapshot of your current saved outfit into an inventory object that fits in the Disguise slot. It locks in whatever styles and colors you have picked out so it cannot be altered other than Hide Helm in the appearance tab. You can then trade/sell this personalized costume to other players. The receiving player does not need to have unlocked any of the styles or colors on their account to use the personalized costume. The disguise cannot be deconstructed, the spent Transmute Crystals are consumed in the process. Its a double cost to the player making the personalized costume as they must first save the outfit they wish to copy which spends gold, then pay the 200 Transmute Crystals to take the snapshot of all 7 armor slots; weapons are not included.
This lets players who have rare or limited time motifs, styles, and colors be able to sell them as a commodity to others and those who have an over-abundance of Transmute Crystals a way to spend them.