I'm sure people will not like this suggestion, but for the sake of the game it should be done.
Items which require effort/time to get them should ALL be none-tradeable, it adds more value to them. I mean all the items we can do missions for are non-tradeable, so an item which takes time to farm like the headgear should be non-tradeable, so only those who put the actual effort in can wear them in the knowledge they worked for it.
The lesser items should be fine, but the headgear, the main item, needs to be none-tradeable.
The devs might like the idea of keeping it as it is and hoping for it to be a money sink to some, but anyone who has worked and put the time to get this item will agree that it should be left for those who do the work, just like the chapter rewards.
If its none-tradeable, it will make people who want it actually work to get it, rather than those simply making a killing from DM farming and/or those people we already know are buying info for their accounts.
I'm not asking this for all clothing, but this item specific and for any futher items which require a good amount of effort/time commitment.



