One of my favorite games of 2015 is Witcher 3, and I absolutely love the kaer morhen armor, So much in fact, that I convinced myself to attempt to make my very own armor using real leather, hand-made chainmail, and multiple techniques that allow me to make such a thing..... with no leather working tools.
To make this costume, you are gonna need a couple of things.
Hot glue gun
Hole punch kit
Mannequin (If you don have one then you will need a large amount of duct tape)
Materials: Leather.... Lots of leather, In various shades of brown
Polyester Thread Cotton material, 1x color for pants, 1x color for main vest sleeves.
Eva Foam (yoga mats are the easiest source generally)
Plastic sheeting. (PVC, or styrene. Or just cut up a plastic storage container)
Aluminum or steel 2mm wire. At least 120m.
Plastic strapping or corset boning. Strapping that's used for package wrapping.
Zips, Buckles, Cord.