Colorful ALFA RAYS jet helmet with clear shield. Jam Tech SPK-01 Used when tandem riding with a child. There is dirt on the outside and inside. The chin strap has a ratchet function strap buckle. The size is in the last photo. Although it doesn't state the size in cm, I think it's for children. - Design: Colorful graphic design - Shield: With clear shield - Color: Yellow and blue stripes - Brand Name: ALFA RAYS Thank you for viewing. Size...For children Usage...City riding