Windsilk
Essence: air
The most readily available of the elemental silks is windsilk. Threads of windsilk can be woven into a ship's sails which not only strengthens them, but also gives the ship the ability to sail far closer to upwind. Windsilk cloth is pure white, very light and flows around even in the lightest of winds.
The largest factory that produces windsilk is in Alyn Iunaes. Most of the production there goes to equip the Iacaris navy, but some is sold for a big profit. It is made by infusing fluxsilk with the essence of air elementals in wind tunnels.