How to decrease the weight of a armor

So, i´m pretty new into this, and i don't know where and how to decrease the weight of an armor.
It's for a enchantment, i already specified the command defining each armor slot and if the enchantment is on the armor piece, but i don't know if there's a command to decrease/specify the armor weight.

Sorry if it's confusing, it's my first time using mcreator xD
(I don't know which category this goes in, sorry if it's on the wrong place)