Natural Hawaii Lava Stone Bead Bracelet Elastic so one size fits all 3 sizes available Comfortable to Wear Suitable for Men and Women The lava stones acts as a sponge-like carrier as it soaks up your essential oils and retains them in the core of the bead. Thank you for supporting a Maui based small business Lava is a porous stone or material that easily absorbs essential oils and and slowly releases the scent throughout the day.