Skating, classic, or just getting out for a cross country ski tour, a skier might have different skis but only need one boot. The Alpina Racing Classic AS is a remarkably versatile boot for XC skiers that will provide exceptional performance in any Nordic skiing discipline and isn&';t just for racing. Once known as a Combi boot, AS stands for Ankle Support provided by the hinged cuff. And given the comfort and warmth Alpina ski boots are noted for, you will probably want to stay outside even longer than before Hinged cuff provides skating and downhill stability Proprietary sole has a smooth flex for classic skiing Zippered lace cover and Thinsulate insulation add warmth Known before as a Combi boot, the AS stands for Ankle Support Compatible with any NNN, Turnamic, or Prolink binding Alpina Size Chart