I believe these armors are made with magic enchants in mind, so i believe most of these are made with "magic metal" woven in the textiles and that's why it's so light and the defense enchants make it better than any other light/medium armor, now if you want plate armor then that's another thing, they are stupidly expensive and if you want it to be made of "magic metal" then you'd better sell a kingdom or two, but seriously these armors are not made to take the full force of an attack, just to let the weilder not be as defenseless as using regular ol' plain clothes
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monkey123 the question is, why aren't you?