The 54cm and 56cm fits the RZ-34Y Youth Zamp Model Helmet.
The XS to XXL fits the RZ-34 and RZ-35 Zamp Model Helmets.
This is a Special Order Part. All special orders are subject to a restocking fee. If you would like to order this please e-mail email@example.com or call 1-888-466-5278. Or in the checkout notes include the item number and a note.