Look how gorgeous this is! And also incredibly detailed and probably likely to make me swear at it a lot. First up – referencing. This is a great shot as it shows a lot of the armour detail.
Here in a capture from the film I can see she has a dark green cloak, worn over the split mail. The green tunic worn under the chain mail also looks like it is split for riding, or heavily gathered with enough excess for movement.
There is probably a padded gambeson on underneath the green tunic for comfort.
Here we have relatively plain brown jodhpurs and riding boots, albeit heavily distressed. You can also see the green tunic, tucked into gauntlets, but visible between the gauntlet and the glove. This means the gauntlet isn’t attached to the glove, which makes it easier.