This basaltic mineral pumice, made from earthstone lava, sloughs away dead cells on tough, dry skin to revive its healthy and youthful glow. While tough on calluses and dry spots, this pumice stone is light enough that it conveniently floats in water. Bring your exfoliating stone with you in the shower or bath to smooth out knees, elbows, heels and other rough areas--with fantastically smooth results.