Ouwoer helmet with more protection Ouwoer helmet is made of ABS and EPS, light weight for kid's cozy wearing, and provides more safety. Suitable sports Cycling Mountain biking BMX biking Hiking Camping Rock climbing Scooter Skating Skateboarding Street dance Suitable users Toddler / Kid / Child / Youth Fully adjustable Crank adjustment dial in the back of helmet and chin straps are adjustable to fit user comfortably from 360 degree. The chin straps are soft, no more worries about that the straps may scratch child's sensitive skin. Straps buckle is easy to fasten and release. Padding system The interior padding system, 2 sets of interchangeable pads with different thickness (5 mm and 8 mm), provides effective shock absorption and sweat absorption, makes you cool while wearing. The pads are removable for cleaning, keep you away from odor and bacteria. Please use mild soap and water only for cleaning. Colors and sizes Various colors and sizes for users of different ages, genders, head circumferences. Color: Black / Blue / Red / Yellow-green / Pink. Size: Choose the helmet size according to the head circumference classification. S: 48-54 cm (18.9-21.3 inches). M: 54-57 cm (21.3-22.4 inches). L: 57-61 cm (22.4-24 inches). Package includes 1 x helmet