As Seen on TV — If you’re struggling with thinning hair, bald spots or flat, lifeless hair, you need HairShark, the instant volume styling tool that won’t damage your hair. Boar bristles on one side give you instant volume without damage, while the patented shark-like teeth on the opposite side smooth and polish hair. HairShark works on every type of hair from thin to thick, straight to curly. Use it to disguise outgrown roots, thinning hair and even bald spots. 9.5” L.