DEEP FIT: Bike helmet for children with good protection for the neck and temple area and a visor-like front edge to protect the face. SIZE ADJUSTMENT: adjustment wheel for a good fit - by turning the adjustment wheel, the head-enclosing ring inside the helmet adjusts to the head circumference. FOR PLAITS: height-adjustable adjustment system at the back of the head can create enough space for a plait - ideal for children with long hair. LED LIGHT: rechargeable LED rear light (with USB) & reflectors on the child's helmet ensure greater visibility in road traffic. GOOD VENTILATION: 4 air inlets and 4 air outlets in the helmet ensure that the child does not sweat too much - fly nets in the air inlets keep insects out. PRODUCT DETAILS: Unisex children's bike helmet for the little ones - incl. chin pad - size in centimetres corresponds to the wearer's head circumference.