Manufacturers instructions : Make sure the area to be patched is clean and dry. Heat up iron to the hottest setting. Place patch to area required and cover with a damp cloth. The damp cloth will protect the patch and surrounding fabric. Press hard for 15-20 seconds (no steam) with a hot iron. Leave to cool for 10mins. Check to see whether the patch is securely fixed. If it lifts a little, then replace damp cloth and press with the iron for a further 10 seconds. Add a few simple stitches using the pre-made holes, for extra durability.Try to avoid washing the item more than necessary. These patches are designed to be permanent, but over time they may loosen. Hand wash is suggested with these patches.