Just a few thoughts about types of clothing which could be added to the game eventually.. 
..Regular clothing..
Crocodile skin - You could get the achievement 'snappy dresser' when wearing an entire outfit made from this.
Camo - The player can utilize a whole range of different materials for this . There can be several kinds depending on the environment.
Silk - i was thinking towards Terraria, with the spider web being harvested for silk at the loom, or there could be giant caterpillars around. Not silly huge, but large enough to see in the long grass.
...Other kinds...
Bug armour - this could be two-tone colours, so it shines in the light, and there could be several styles and swappable colours.
Wooden armour - this could be coated in some kind of resin harvested from the trees, and made as hard as metal. it could be an early game form of protection.
