Made from Bamboo Viscose fabric with 6 silicone strips, strategically placed for extra security. Designed for complete or partial hair loss, for use under a wig. This wig liner is extremely comfortable for a nonslip fit. Perfect for those who have sensitive skin and are irritated by the inside of a wig. This will provide a soft barrier between your scalp and wig. Washable and able to be used over and over again. Available in 3 sizes: Average: (21.5" head circumference) Petite: (20.0" head circumference) This runs small! Although Petite is normally 21.0", I would say this fits Ultra Petite, or 20.0" Large: (23.0" head circumference) If unsure between Petite and Average, we recommend sizing up on this product. Beige color.