This cap is a high frequency bonding cap. ■Alpine Color (Manufacturer Color): White (OWT) Black (BK) ■Material: Outer Fabric: 100% Polyester Lining: 100% Polyester Knit Part: 100% Acrylic Embroidery Thread: 100% Polyester ■Size: Head Circumference: 18.9 inches (48 cm) ■Country of Origin: China ■ 2022 Fall and Winter model.