Sports boot

A sports boot comprising:

• a lower portion designed to surround a foot of a user;
• an outsole;
• an upper portion designed to extend around a lower leg of the user and to be movable in relation to the lower portion;
• blocking mechanisms that at least partially block movements of the lower portion in relation to the upper portion, wherein the blocking mechanisms are located at a rear of the sports boot;
• the upper portion comprises a lateral portion and a medial portion, disjointed and each rotationally articulated with the lower portion;
• the lateral and medial portions of the upper portion of the sports boot comprising two distinct portions separated from each other by a gap at the rear of the sports boot;
• connecting mechanisms arranged in a rear zone of the sports boot, the connecting mechanisms connecting the lateral portion with the medial portion of the upper portion of the sports boot;
• the blocking mechanisms comprise a blocking element movable between the following positions:
• a blocking position, in which the blocking mechanisms at least partially lock movements of the upper portion in relation to the lower portion;
• an unblocking position, in which the blocking mechanisms allow free movements of the upper portion in relation to the lower portion;
• and
• in the unblocking position of the blocking element, the blocking mechanisms allow a translational movement of the lateral portion in relation to the medial portion at least along a direction perpendicular to the outsole of the boot.