Rain and sunlight, two most concerning elements when we talked about comfortable of the living space. These two elements had been a concern since the old days. Ancient Egyptian and Syrian used what they called woven mats to shade their market stall and their houses. The oldest written text about the used of fabric-like material came from a Roman poet Lucretius, in 50 BC, saying â€œLinen-awning, stretched, over mighty theaters, gives forth at times, a cracking roar, when much â€™tis beaten about, betwixt the poles and cross-beamsâ€. Since then, the material used to shade us from rain and sun has evolved tremendously. We are now used to a canvas fabric in awnings and umbrellas.