The Power Speed Resistor is the most cost-effective speed resistor, ideal for training in any sport. The Power Speed Resistor works best when one athlete wears a webbing harness with leash for the second athlete to hold back. Suitable for short sprints, lateral shuffles and explosive forward and backward movements.Nylon harness and webbingAdjustablePadded shoulder strapIncludes manualWarning: Not suitable for children under 3 years, Risk of strangulation. Use under adult supervision