Well.technically speaking, armor is any type of clothing that protects you. even from the smallest things. I will tell you about an armor that are easily made and the materials are free! I please ask that you don't take the armor right from a live tree. take is from dead ones (thanks, I'm a guardian, its kinda my thing to try to keep things safe, be respectful to the plants that give you the air to breathe) now, I don't have a full armor suit, I'm just giving you a bit of an example in order to let you make a full suit.

WARNING, anyone anticipating the arrival of a full bark suit, I have unfortunate news, somebody has found the bark and either broke or bent or threw them, and I cannot make it, I don't take bark from live trees so it will be awile.

P.S MORE ARMORS SOON
soon I will be making copper plate armor and shingle plate armor, my shingle are industrial and aare multilayered, so try to bear with me by tacking regular shingles together, but I will be making a full suit and a sheild so that's not going to be easy

Step 1: Bark Armor Basics

lightest armor I could think of with armor capabilities (other than regular clothes). I would use this armor in sparring with wooden practice weapons. if your fighting, depending on how hard the bark is, you could have one hit and the armor break, or five. so with this armor, fighting with it is better left for people who know how not to get hit with a weapon, meaning they won't need heavy armor as much as you do.

Step 2: Materials for the Armors

cool thing about bark, is that is is usually rounded, so it fits on your body super easy. the things you'll need is a good bit of thick bark, (dry, not too dry) if the bark is really straight and stiff, put it in water and carefully shape it to your body. you also need string for the little armors. and thick twine for the bigger ones. and a knowlage of how to tie and untie knots.

Step 3: Pauldrons

(also known as shoulder armor) get bark that rounds your shoulder. I have a better armor type that I will be making a tutorial of soon.

Step 4: Thigh Armor

mine has a thickened knee cap. try to find one like that.

Step 5: Top Greave (Front)

this is for the freont, there are four parts of a greave, the front plate (this one) back plate (same thing backwards) then a plate on your shoe. then one right between you top plate and foot plate. (look at knights they have them)