The ProTec Liner Kit - Ace Skate Helmet is designed to replace worn out pads or change the size of the helmet. It includes the front and back liners of the helmets and is held in place by velcro. It does not have the crown liner which is glued in place.
The Ace Skate Helmet has only one size shell so you can change the liner size and change the size of the helmet. This kit comes with fitting information.