This is a spin beanie that can be used for breakdancing, headspins, and other moves. Wearing this during practice can slightly reduce the pain when your head hits the floor. Unisex, free size, suitable for both adults and children. The beanie uses black mesh material. This makes it easier to slide during power moves and spins. Made of acrylic material, it has high heat retention and durability, making it ideal for practice. The classic plain black color can be stylishly worn with any outfit. Product Specifications: Contents: 1 hat Material: 100% Acrylic Color: Black Sizes: Adult, Child, Girl (3 types total) Suitable Head Circumference: Adult: Approximately 54cm and up, Child: Approximately 34-54cm (ages 1-7), Girl: Approximately 38cm and up (ages 3 and up) Normal Size: Adult/Girl: Length 29cm x Width 19cm, Child: Length 25cm x Width 17cm Folded Hem Size: Adult/Girl: Length 22cm x Width 19cm, Child: Length 19cm x Width 17cm *There may be a margin of error of approximately ±1cm from the above sizes. Please understand. *Due to the characteristics of the material, it is stretchy and can accommodate a wide range of sizes. *When washing, do not use a dryer or iron. *The girl's size does not include the mesh material. Please note.