2-in-1 skate transforms from tri-skate to inline skate Rear brake blocks to help build confidence during those early stages of learning to skate Tri to inline skates. Shoe size: 9-12. Cushion lining for comfort. When your child is confident on the 3 wheels, easily adjust them to an inline style for even more speed and freedom. 2-in-1 skate transforms from tri-skate to inline skate. Rear brake blocks to help build confidence during those early stages of learning to skate. Tri to inline skates. Shoe size: 9-12. Cushion lining for comfort. Maximum user weight: 20kg. For ages 3 years and over. WARNING(S): Not suitable for children under 3 years old. Only for domestic use. To be used under the direct supervision of an adult. Protective equipment (helmet, knee pads, elbow pads and wrist guards) should be worn, not to be used in traffic.