Chameleoweave fabric is woven from strands of the famed mimetic plants found growing along the margins of the Mournland. It is difficult to pin down the exact color and texture of the cloth, since it tends to take on the characteristics of other fabric with which it is worn. A character wearing chameleoweave clothing gains a +1 circumstance bonus on Disguise checks. Chameleoweave clothing costs 100 gp more than a normal outfit of the same sort, and weighs 1 pound less (or 1/4 pound less for Small characters).
Source: Magic of Eberron