You can't, sadly. I'd love to have my Crab armor on, but not the helmet.
after doing the tesseract sf i want the oldschool arachnos uniform
Aww. that's very sad indeed...Well We can only hope that they fix that, 'cuz im sure that more would love so have more uniforms then just one.
I really want the option of multiple uniform slots, too. My crab wouldn't be interested, but my widow would want a helmet on/helmet off choice, so two uniforms would be lovely. 
They should have a costume toggle button in the cozzie creator, Uniform/Other for V Extended AT's.
This toggle button could then select which costume listings are available for that slot.
Uniform - Arachnos uniforms
Other - All other costume choices
(Technically: Super/Casual for all other AT's)
Nuff Said...
Coolio Wolfus leader of Coolio�s Crusaders on Union.
Tekna Logik leader of Tekna�s Tormentors on Defiant.
Creator of: Coolio's Tech Beacon Replacements
AE arc 402506, 'The Rise and Demise or Otherwise of Tekna Logik...'.
How come you see Wolf spiders in the game with no helmets on but have to have a helmet on your VEAT? And they get that Arachnos face decoration.
Greg x
Yeah, i've been wondering for a while if there's anyway you can have a second, third and fourth Widow / crab armor, 'cuz when i tried i wasen't able find any way to have another one...
Anyone know how? Or is it that simpel that you just cant?...
If so i think that they should fix that 'cuz whats the fun in not being able to be a Widow / crab and not be able to look like them in more and different ways, like Night Widows with that Coat tail and so on. :<