Ski boots

A shell for a ski boot, the shell including a left portion and a right portion which are able to switch between a translation open state in which the left portion and the right portion are separated from each other by a distance and a closed state in which the left portion and the right portion are closed with each other,

• wherein in the translation open state, the left portion and the right portion are able to pivot relative to each other,
• wherein the shell also includes a locking mechanism and a separation bias device,
• wherein the locking mechanism is configured to keep the shell in the closed state and is able to be released so as to allow the shell to be placed in the translation open state, and wherein the separation bias device is configured to bias the left portion and the right portion toward the translation open state,
• wherein the left portion includes an upper left portion and a sole left portion, and the right portion includes an upper right portion and a sole right portion,
• wherein in the closed state, the upper left portion is engaged with the upper right portion and the sole left portion is engaged with the sole right portion, and in the translation open state, the upper left portion and the sole left portion are physically spaced from the upper right portion and the sole right portion by the distance, respectively, and
• wherein the separation bias device includes an upper spring provided between the upper left portion and the upper right portion so as to bias the upper left portion and the upper right portion in a direction of being away from each other.