This cap features a face mask and is made with "Virus Shield" fabric, which uses a special "tungsten oxide" to rapidly break down viruses using sunlight, as well as weak indoor light sources like fluorescent lights and LEDs. The V-shaped design where the mask attaches uses Velcro, allowing for a stylish look even when the mask is removed. The back is also Velcro, providing an easily adjustable and comfortable fit for anyone. 【Virus Shield】 Photocatalytic antibacterial and antiviral material Functional sweatband (absorbent and quick-drying) Material: 100% Polyester Size: FR (Length from crown to hem 16.5cm / Brim 7.5cm / Head circumference 56cm) Face Cover (Width 42cm / Height (front center) 34cm) ※ Product size refers to the finished product size. (Product size = nude size + ease allowance.) Due to the characteristics of the product fabric, there may be an error of approximately 1-2cm.