Adjustment system

An adjustment system comprising:

• a strap having a thickness that is smaller than a width, the width being smaller than a length, the strap being divided into a first strand and a second strand, the second strand continuously extending the first strand;
• an adjustment buckle configured to perform adjustment of the strap, the adjustment buckle defining a channel receiving the strap, the strap being able to slide in the channel by pulling on the first strand or the second strand, the channel having a width at least equal to the width of the strap and a height larger than the thickness of the strap;
• wherein the adjustment buckle has a body, a partitioning wall and a cover that define the channel, the strap being inserted in the body via the first strand and passing round the partitioning wall to define a loop and exit from the body via the second strand, the partitioning wall being fitted stationary with respect to the body;
• wherein the cover and the partitioning wall define a slot for the strap to pass through and the cover is separated from the partitioning wall by a distance larger than the thickness of the strap and less than three times the thickness of the strap so as not to impede the sliding of the strap, the cover having an inner surface facing the strap in a first direction and being configured to obstruct enlargement of the loop,
• wherein the first direction is a direction of measurement of the thickness of the strap between two deformation points of the strap, the two deformation points corresponding to two contact points between the strap and the partitioning wall between which the strap makes a U-turn.