So i'm currently working on a Halo 5 buck build, and the armor is coming along nicely. But the more I look at Buck the more unsure I am how to do his under suit, and by extension, spartan under suits in general. (I've only ever built ODSTs and I just used military BDUs for their under suit) I've seen a few methods used, the most common just being a black skin tight body suit. But this wont work for me because I a very skinny guy and I need to bulk myself up with the armor for it to look proper. On top of that, for most Mk V and VI armors the black morph suits work well, but the Spartan 4s have thicker and more complex under suits. So i'm wondering how to make a good under suit for Spartan 4s and how I can use it to make by self bulkier to fill out my armor. I thought about building an under suit with some 3mm craft foam, but wasn't sure if that the right way to go. Let me know what works for you, thanks.