The IKO Metatech Polyester Fleece is a strong non-woven polyester with incredible resistance to tearing in any direction. The ideal balance between high tensile strength and an impressive degree of ultimate elongation, this powerful reinforcement is still thin enough to be quickly embedded on the top and bottom surfaces in the Metatech coating. You’ll find the IKO Metatech Polyester Fleece performs precisely that way – strong enough to accommodate the stresses on the roof, but roofers like the way it can be bent and shaped into corners and details.