The Sibel Bob Tuo cutting collar creates a perfectly smooth, flat surface on the shoulders. This ensures that the hair lies completely flat, allowing for precise lines, such as those required for bob cuts. It is made of flexible rubber. It is waterproof, resistant to chemicals (dye/perms), and can be easily wiped down and disinfected after use. This collar is lightweight and adapts perfectly to the client thanks to its own weight. It seals tightly at the nape of the neck, preventing cut hair or water from getting underneath. It does not slip during cutting and stays exactly where you place it.