Subarmalis or gambeson?

[Atawulf]

Which armour? Which geographical region? Mail, scale, and plate can have a padded liner so don't need anything except regular clothing. Lamellar needs something underneath. So does segmentata, but that wasn't used during the time in question.

Chainmail, Hispania 5th-6th century... I ask if it's appropiate wear a gambeson under the chainmail, a gambeson like Armae sells (the picture's one). This is my doubt, I want to be accurate but I don't know what If it's appropiate to wear this kind of gambeson or it's better to buy another kind of subarmalis.
Thanks.