Rainbow Z16 shade cloth has been proven over the past 18 years. Recently a shade structure in Queensland was dismantled. The shade cloth had been in place for 11 years and showed little change from new apart from being a little grimy.
This is a photo of a sample of the old cloth adjacent to a sample of new cloth of the same design. Tests on the old cloth confirmed it possessed even better UV block than the new, attributed to the dirt on the old.