The SL 70 AC is a binding that can be made to fit either adult or youth ski boots. For kids on the borderline of (the borderline is 23.0, boots greater than 23.0 are considered ‘adult’), this has to be the choice, because you can’t make a mistake. It is a SuperLight (SL) fixed binding with a DIN range of 2-7, so appropriate for youths or lighter weight cautious adult skiers.
The Head SL 70 AC ski bindings are the perfect bindings choice for junior skiers. The SL 70 bindings fit both adult and children’s boots. So as your kid’s feet grow but his DIN setting stays the same, you will be able to use the same bindings.