Washed it in hot water right out of the bag then hung on line (not an easy feat) until nearly dry.  Then I put it on the sofa and tucked and tucked using a wooden ruler till it looked good. Minimal wrinkles, nice sturdy material.  Suggest a quick read of the directions before putting it on, unlike I did, but it's pretty user friendly, especially as it gives you clues such as "back" and "left arm".   I wanted off-white and was concerned it would be too putty colored but it is just fine and I am most pleased.