Does polyester fabric have a right and wrong side?

The answer is SOMETIMES! You will find that the lightest weight polyester fleece (called Mirco fleece) does have a right and wrong side. The right side will be clearly smoother than the wrong side. Medium and Heavy weight polyester fleeces usually do not have a wright or wrong side. If one side appears bumpy while the other is smooth, then then smooth side will be the right side. Check by running your hand down the fleece on each side. Do you feel or see a difference? If so, treat the smooth side as the right side.