Adrenaline Design Powerfoot Hockey Skate Performance Insert Improves the POWER, STABILITY and COMFORT of your hockey skates. Improves the fit of your skate therefore enhancing the energy transfer between your foot and the skate resulting in MORE EXPLOSIVE STRIDES. Stabilizes your toes within the toe box which increases your toe support giving you GREATER LEVERAGE and IMPROVED LATERAL STABILITY. Improves STRIDE EFFICIENCY. Relief from BONE SPURS and PLANTAR FASCIITIS.