Originally developed for the service dog use. Tremendously fast to create, super processed, reflected in the dark handle for safe control and grasping the dog if necessary, without slighting the cervical spine as the tug on the collar. Possible attachment of bags or side of small flashlight available. Waist belt cuts in choosing the right size and due to the variable adjustment of the chest strap with my dog not while running even when holding the handle in the armpits .... very important !!! Smooth buy recommendation