Heart with wings in red heart. Angel Iron on Crystal designs are easy applied with hot iron. They come sandwiched between two pieces of plastic. You remove the white plastic and position the design in place. Apply iron set on wool/silk. Heat for about 45 seconds depends on size of design. Allow to cool slightly remove the clear layer of plastic. If the crystal lift off lay plastic back down and apply more heat. If secured correctly they do go through the washing machine on gently wash.