This recall involves Wemfg's children's multi-purpose bike helmets. The helmets were sold in size small (S), fitting a head circumference of about 19-1/2 to 21-1/4 inches; and in the following multiple color combinations: blue/pink, green/blue, green/blue/purple, pink/blue/green, pink/purple/pink, pink/yellow/green, purple/pink/blue and purple/pink/yellow. All helmets have black padding, black straps and a black and red buckle. The helmets have a black and red plastic knob at the back of the helmet for adjusting the fitting. The model "MD-710-S" is printed on a white label on the inside of the helmet.