Specifications: A new sensation is here. The ability to jump 2 meters (6 feet) in the air and  Run up to 9 feet with incredible speed. Enjoy incredible heights and speed  With your powerskip.   Functions:  Powerskip is defined mainly by a flat spring controlled upon deformation, so  That the result is a straight movement relative to the ground. With the riser's  Functional principle, depressive spring characteristic and backward movement  Of the force point during deformation are achieved. This supports the natural  Force point movement in the heels direction at higher loads and allows the  Runner to transpose his optimal jumping energy. Hence, you can really fly.   Good for loosing weight (by reducing fatty deposit, waistline, buttocks, calf  Diameter) and physical exercise. Increase hdl-c (high density lipoprotein  Cholesterol) and reduces thr (total cholesterol and high density lipoprotein  Cholesterol rate), build up the lower torso.   Increases hdl-c (high density lipoprotein cholesterol) and reduces thr (total cholesterol and high density lipoprotein cholesterol rate). Build up the lower  Torso.   Adult model powerskip:  The adult model powerskip give the ability to jump up to 6 feet in the air and  Take running strides of up to 9 feet in length. Powerisers are for the average  Athletically-inclined person and the professional circus performer.   Incredible basketball slam dunks, amazing flips, breath-taking heights - all  Are made possible with the powerskip.   Description:  1) spring  2) fixing device for shoes  3) wrap calf  4) control lever   Specifications:  1) dimensions:185 x 390 x 890mm  2) weight:8.2lbs (1pc)  3) model no.: Ss-001  A) weight:60 - 80kg  B) weight:80pro  C) weight:80kg~110kg  D) weight:110kg  E) weight:30kg~40kg(kid)  D) weight:40kg~60kg(kid)