Lava stones are a porous stone that are perfect for holding a scent and providing aromatherapy. Add just a few drops of your favorite essential oil to the lava stones for a scent that will last several days. Once the scent diminishes, add more drops or change up the scent. Ladies can also add a perfume or guys can add cologne. The bracelets come in a variety of colors and are strung on a stretch cord for a variety of wrist sizes as well. Women's bracelets will fit 6.5"-7.5" and men's will fit 8.5"-9.5". Custom sizes can also be made upon request. Choose from a rainbow of colors and endless aroma possibilities to brighten up your senses.