Preciosa Flatback Crystals Non Hotfix (otherwise known as Rhinestones) are perfect to add sparkle to a wide range of items. You can use them to embellish and decorate nails, clothes, theatre and dance costumes (country and Irish), equestrian outfits, wedding dresses, shoes, pet collars and for card making. Preciosa Flat Backs No Hotfix have multi-layer satin foiling for extra brilliance and protection, and for easy application with one or two component glues to various types of material.