Thanks for the follow! It's all cardboard, and I mainly followed tutorials. For the helmet, I used https://www.youtube.com/watch?v=in9JGT2JifM and modified it, the vambrace was from Ryzer (https://www.therpf.com/forums/threads/mandalorian-armor-custom-free-foam-files.334311/) though I had to make the Whistling Birds and shield emitter from scratch, the glove is from KamuiCosplay (https://www.kamuicosplay.com/product/robotarm/), and the Jetpack + Chestplate is from Epic Cardboard Props (https://www.youtube.com/playlist?list=PL48Pr1hBPbucivPPgpGkmaAgNK_IiiFhW).
If you're doing a 3D-printed kit or something else, check out http://mandomercs.com/ for help