The pump technology Offers the ultimate in personalized pro performance and comfort. Heavy duty ballistic nylon Provides resistance to cuts and abrasions for long term durability. Duratex charcoal liner Ensures durability and comfort. F-i-t-system footbed Provides excellent fit and comfort. The low profile outsole offers a reactive feel on the ice. Features a felt tongue with full-coverage comfort foam and a lightweight molded external lace-bite guard and tongue binding.