On Terrorantula Silk

I recently had the fortune to purchase a strange silk from a traveler hailing from the deserts of Ro. After experimenting for quite some time with the new material I discovered that when sewn into swatches it could be cured with Purified Mana, threaded with Platinum Thread, and using an appropriate pattern tailored into an armor as strong as steel!! One swatch was sufficient to craft a helm, collar, mask, pauldron, or bracer. Two swatches were needed for a waistband, vambraces, gauntlets, or boots. Three swatches were needed for a breastplate, cloak, or greaves.

Source: Ingame book