... to 3 meters(9 feet) with incredible speed. Moonjumper is defined mainly by a flat spring controlled upon deformation ... your Moonjumper.Description 1. Spring, 2. Fixing Device for shoes, 3. Wrap Calf, 4. Control LeverSpecificationKids size(MJ001 ... 65*40*14CM (for 1 pair/inner box)N/W:4.5KG /Pair G/W:5.5 KG/box ... 60KG, 70KG, 80KG, 90KG,100KG,110KG Measurement:88*29*38CMN/W: 7KG/pair G/W: 9KG/pairPacking: ...