Greenweave

Greenweave's rarity is not due to its constituent parts. Dragontail fern, the sole element, is one of the most common weeds in the Elenhos forests. No, the real challenge to acquiring this material is locating a druid capable of spinning the still living fronds into binding matrimony.
  Description: Dragontail fern forms long, sinuous fronds with pinnae that resemble a dragon's scales. Its surface is fuzzy and dappled with all the colours of the forest, creating a hazy optical effect when rustled by the wind. When woven into Greenwave, the resulting fabric maintains this strange appearance.
  Creation: Druids of 5th level or higher can create one pound of raw Greenweave by casting druidcraft on a dragontail fern continuously for one hour. The fern must be alive and rooted, and it is consumed by the process.
  Natural Properties: Greenweave blends in with the surrounding greenery. When located in an area of considerable plant life, greenweave items count as lightly obscured even if they normally wouldn't be, and they always require a passive Wisdom(Perception) score of 10 to be noticed. (Ignore this property if the item's size, shape, or specific surroundings cause its presence to be blatantly obvious) Armor. When located in an area of considerable plant life, a creature wearing greenweave counts as lightly obscured even if it normally wouldn't be, and it can attempt to hide even when only lightly obscured.
  Example Item: Greenweave tent. A tent made of greenweave is far less likely to attract unwanted attention then a regular tent.