Subarmalis or gambeson?

[Atawulf]

5th Century (I'm going to presume prior to the destruction of the Spanish army in 409-414) I'd say your best bet would be maile or scale.

Lamellar seems to have been rare until the mid-5th century when the East began making the transition to it. I think Aetius adopted Lamellar from the Huns and began implementing it in the Roman army, and the East at this time seemed to be copying military innovations in the west, like Lance-and-Bow warfare.

I'd say your best bet is to make your own Subarmalis, of thick linen quilted together and with leather pteruges.

Thanks for the answer
But my problen is I'm a little bit clumsy and also I' haven't so many time to do handicraft. This is the reason I'm asking what wolud be my best choice if i wolud buy a subarmalis or gambeson to wear under chainmail for this period.