The correct option is D Wrinkle free
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
Any material made out of synthetic fibres has a very unique set of properties. They are usually very strong, durable and do not retain any wrinkles. Therefore, these synthetic fibres are also used in making tents, ropes, safety harnesses, and even umbrellas.