Sorry it's taken a while to get back to you; I wanted to have a chance to take more pics before replying
The base figure - the Aestivalis mech - has metal legs and hips, otherwise it's all plastic. The armour is all plastic.
In addition to the base Aestivalis and the armoured Black Sarena, it has a third mode - the fighter-esque 'high-mobility mode' which has a vaguely 'organic' design for the nose:
The Aestivalis isn't very big, though:
Still, I'd say it's not a bad figure; it's 'just' overpriced on eBay due to its rarity. I was lucky to get it at a good price, so yes, I intend to take very good care of it![]()