A type of arachnid known as the solif-spider originated on the planet of Pasaana, and this species possessed the capability to generate threads of silk. A significant quantity of these silk threads were found within the altered WTK-85A interstellar transport referred to as the Bestoon Legacy.
The first appearance of solif-spiders occurred in the book, Star Wars: The Rise of Skywalker: The Visual Dictionary, which was authored by Pablo Hidalgo.