The knitted shade cloth was designed in Australia using UV-treated materials for general-purpose garden and horticultural applications. The unique construction of this material is designed to block up to 50% of harmful UV rays to provide heat protection while still filtering light for optimal growing conditions during summer. During the winter months, the shade cloth protects against frost. Its industry-leading 10-year warranty against fabric degradation provides peace of mind that this product will provide heat protection for many years.