We tested various body positions in which the bag has to function in a way that the gadgets are easy accessible and that the bag doesn’t move around the body in uncontrolled directions. We were careful to arrange objects according to weight, so that one part of the bag would not outweigh another.
When the upper part of your body (torso) is leaning forward (as though you’re on a bike) the bike hook shackle holds the bag close to your body and prevents it from falling forwards towards your chest. It's designed with a fixed and elastic part so you have the necessary ability to move while the bag is secured in the correct position. The other end of the bike hook shackle is a crocodile clip that you can secure to the edge of your trousers, pocket or belt.