You can wash items embroidered with Mylar designs inside out. It would be best to use cold water using the delicate cycle. Since it has properties similar to plastic, it would be unwise to put it in the dryer. Garments embroidered with Mylar would be better if air-dried. If you need to iron garments with Mylar embroidery designs, turn your garment inside out. The Mylar embroidery sheets of Purely Gates can be washed, dried, and ironed. But if you want your embroidery design to last a long time, it is recommended that you iron the embroidery from the backside of your garment to maintain the quality of your embroidery design.