3D Injected Boot It provides a new level of comfort and fit for recreational hockey players. The new construction makes the skate more durable with better visual appeal Pre-Sharpened Runner Unlike most skates that need to be sharpened, these runners are ready to skate, utilizing a standard sharpening hollow. ADPTSIZE Insert - Junior Sizes Only Extend the life of youth skates with the ADPTSIZE insert. We recommend buying the skates one size bigger than the true foot size and add the insert for a proper fit. Once the sizing is outgrown, remove the insert and the skate will fit perfectly again!