Shetla Fibers

is the third of the 5 available fibers in the game. It is used for tailoring and alchemy. Gathering shetla fibers can only level the player's Plant Gathering level up to a maximum of 201. The plants have a chance of dropping Essential Mana, Idyllic Leafs, Cochineal Beetles, Indigo Petals, Murex Snails, Saffron Stalks, or Purpurin Roots instead of the actual fibers.

Source
Dropped by monsters, crystals and plants from the following locations below
 * Poporia
 * Pora Elinu
 * Ostgarath
 * Mistmoor Island
 * Grim Coast
 * Rain Cage
 * Val Aureum
 * Aurum Road
 * Essenia
 * Essenian Crest
 * Blessing Basin
 * Blightwood
 * Timeless Woods