The last on a ski boot is the part of the boot that determines the shape and size of the foot. It is important to get a ski boot with the right last, as this will determine how well the boot fits and how comfortable it is to wear. ski boots are available in different lasts, so it is important to try on a few different pairs before making a purchase. Once you have found a pair of boots that fit well and are comfortable, you will be able to enjoy your time on the slopes much more.