High density innersole to replace the flimsy innersoles used by most manufacturers.
A good way to take up volume on skates that are slightly too large or broken in and stretched out.
Trim to fit with scissors - just trace existing innersoles and cut.
Review: Bill uses these innersoles and likes them. They aren't spongy like athletic shoe innersoles, so you don't lose control of the skate.
Also a little warmer than "stock" innersoles.