I was playing around with different cosmetic overrides and now when I put on armour I cannot see it?  It shows that I'm wearing it but the display only shows the same as if I was wearing nothing?

 

Any help would be appreciated

It sounds as if you probably put on the 'hide' option on some pieces. You can use the 'clear' icon to fix it under Gear->Wardrobe, here:

 

 

Click the appropriate slot and then click apply and you should be all set! :)

Cheers