Which parts do you want to know about specifically??
To be honest, my helmet was pretty flawed so I wouldn't recommend making it like mine, I would like to remake the helmet... but I used an actual skateboard helmet as the base, used clay, styrofoam and stryofoam balls to build the shape and some see through coloured plastic for the visor.
The black 'body suit' is actually two parts since I don't really like the use of actual bodysuits for Mituna but that's just me.
The 'sash' part is also two pieces because I'm new to sewing and I wasn't sure how to make the collar attatched to the sash part...
For the boots, I bought some black ones and put some masking tape on them to keep a stripe black and painted the rest yellow. It took about 4 hours to paint each boot.