>>714070984
Have you ever seen a 20 kg gym weight lifting bar?
Add some ~5 kg to it and you have about the same weight as full plate set on the light end.
That is to say that you have almost the same amount of metal in 20kg bar as in an suit of armor, except here it is all spread out in thin sheet. If you are a heathy male, older than 15, you should be able to move around with that weight spread across your body.