From Superfeet:

Experience the improved skate fit and enhanced comfort only Superfeet insoles can provide. Cushioned Aerospring™ Glide comfort foam combines with our contoured Superfeet shape to stabilize your feet and help you move more efficiently across the ice, while minimizing friction, blisters and hot spots.

• DURABLE CONSTRUCTION
  Superfeet insoles keep their shape, delivering reliable support and comfort for up to 12 months or 500 miles, whichever comes first
• THIN, HEEL-TO-TOE PROFILE
  Designed specifically for skates
• AEROSPRING™ GLIDE COMFORT FOAM
  Reduces foot fatigue and adds cushion where you need it most
• CONTOURED SHAPE
  Stabilizes feet, minimizing friction, blisters and hot spots
• PERFORATED FOREFOOT
  Improves air circulation and breathability
• MOISTUREWICK™
  With long-lasting odor control to keep skates fresh
• FLEXIBLE HEEL CRADLE
  Keeps your heels secure in the skate