Sparking flat back crystal rhinestones easily bond to most surfaces including wool, cotton, rayon, lycra, silk, acrylic and denim. A layer of hot-melt adhesive creates a bond to the material when activated a hot fix applicator, Crystals are wash-resistant and can be used to embellish clothing, handbags, lanyards, scrapbook pages, ceramics, wood, glass, jewelry components and more.