Silicone integrated inner cap for full wigs that is less likely to slip. The images are from the official website. - Colors: Beige/Black - Color: Black - Material: Silicone integrated - Application: For full wigs - Price: ¥3,680 - Size: M (54-57 cm) Thank you for viewing. It has silicone on the inside to prevent slipping. Adjustable with an adjuster. I wore it 2-3 times, but it was a little too big for me, so I'm reluctantly selling it. Yuriko Wig's under caps are popular and often sold out, so I'll sell it to someone who needs it.