Knapsack fitted with an angular damper between the back of the bag and the strap and/or belt assembly

A knapsack comprising a bag, a strap assembly for securing the bag to the shoulders of a user, a belt assembly for securing the bag around the waist of the user, and a fastening system for fastening the strap assembly and/or the belt assembly to the back of the bag, said fastening system comprising a first piece secured to the strap assembly and/or the belt assembly and a second piece secured to the back of the bag, said pieces co-operating with each other to enable the first and second pieces to be fastened together and to pivot mutually about a pivot axis perpendicular to the back of the bag, wherein the fastening system comprises:

• a) at least one elastomer element secured to one of the two pieces;
• and
• b) engagement means secured to the other piece and engaging the elastomer element at least during pivoting so that during pivoting the engagement means causes the elastomer element to be deformed, thereby opposing said pivoting.