Swarovski Flatback Crystal Hotfix are also known as Rhinestones. They are perfect to add sparkle to a wide range of items. These flatbacks can be used to decorate jewelry, nails, clothes theatre and dance costumes, wedding dresses, shoes and other art crafts. Swarovski Flatbacks Hotfix are backed with platinum foiling for extra brilliance and protection and are easy for application to a variety of materials. Hotfix flatbacks crystals come with an adhesive wich activates through heat. This means you will need to use a hot object like an iron without steam or a hotfix applicator to stick the crystals on clothes or fabric.