Certain polyester items are machine washable, while others are dry clean only, so it is very important to refer to the item's tag for specific washing instructions. If the item does not have a tag or washing instructions, contact the manufacturer of the item or refer to the manufacturer's website for more details.
Polyester is a synthetic fabric. It is very durable but also very heat sensitive, so be sure to use the appropriate water temperature if the item is determined to be machine washable. If using a dryer to dry the item, avoid high heat, as this could melt, shrink or deform the fabric.